🔥 How to Cook Without Electricity or Gas: Every Method Compared

The electricity goes out. The gas is off. Maybe a storm has knocked out the grid for three days, or a line fault has taken your area offline for longer than anyone expected. You have food. You have hungry people. And at some point in the next few hours, you are going to need to cook something.

How you handle that depends almost entirely on what you prepared before the emergency — because cooking without electricity or gas is not something you improvise well. The wrong method in the wrong setting can fill a room with carbon monoxide. The right method, chosen in advance and tested before you need it, makes a power outage a manageable inconvenience rather than a health crisis.

This article covers every practical method for cooking without electricity or gas: propane and butane stoves, wood fires, rocket stoves, solar cookers, alcohol stoves, backpacking stoves, charcoal, retained heat cookers, and candle-based heating. For each, you will find a plain-language assessment of fuel availability, cost, indoor suitability, carbon monoxide risk, cooking speed, and fuel efficiency — and one comparison table you can use to make a decision quickly.

The most important factor is not which method produces the best food. It is which methods are safe to use where you live. That question gets answered first.

☠️ Carbon Monoxide: The Risk That Shapes Every Decision

Before comparing cooking methods on any other dimension, carbon monoxide (CO) must be addressed. It is the factor that makes several otherwise useful methods dangerous or unsuitable for indoor or apartment use, and it kills people every year who underestimate it.

Carbon monoxide is colourless, odourless, and tasteless. It is produced whenever fuel — wood, charcoal, gas, alcohol, or any carbon-based material — burns incompletely. In a well-ventilated outdoor setting, CO disperses harmlessly. In a closed or semi-closed indoor space, it accumulates rapidly. Early symptoms — headache, dizziness, nausea — are easy to dismiss as stress or illness. By the time serious symptoms appear, cognitive impairment may already be preventing clear thinking.

Even methods with lower CO output — propane stoves, alcohol stoves — should be used only with windows open and ventilation confirmed. The guidance for each method below specifies the indoor risk level honestly.

A battery-powered CO detector is inexpensive, takes up no space, and should be treated as mandatory equipment alongside any alternative cooking setup. If your CO detector alarms during cooking, stop immediately, open all doors and windows, and move everyone outside.

🛒 Gear Pick: A standalone battery-powered CO detector — the Kidde Carbon Monoxide Detector or First Alert CO400 — costs under $25 / £20 and can be kept in a kitchen drawer as part of your power outage kit. It is the cheapest insurance you can buy for indoor alternative cooking.

📊 Full Method Comparison Table

The table below summarises every method covered in this article. Use it to identify which options fit your situation, then read the detailed section for each method you are considering.

Method	Indoor Use	CO Risk	Fuel Availability	Approx. Fuel Cost	Cooking Speed	Fuel Efficiency	Best For
Propane camp stove	With ventilation	Low–moderate	High (hardware stores, camping shops)	Low–medium	Fast	Moderate	General-purpose cooking, families
Butane camp stove	With ventilation	Low–moderate	High (supermarkets, camping shops)	Low	Fast	Moderate	Short-term, compact storage
Alcohol stove	With ventilation	Low	Medium (methylated spirits widely available)	Very low	Slow–moderate	Low	Solo/small use; ultralight kit
Backpacking stove (canister)	With ventilation	Low	Medium–high (outdoor shops)	Medium	Fast	High	Efficient, low-bulk option
Rocket stove	Outdoor only	High	Very high (wood, sticks, scrap)	Near zero	Moderate–fast	Very high	Sustained cooking; wood-abundant areas
Open wood fire	Outdoor only	High	Very high (firewood, scrap)	Near zero	Slow (setup)	Low	Off-grid, rural, long emergencies
Charcoal grill	Outdoor only — no exceptions	Extreme	High (supermarkets)	Low	Moderate	Moderate	Outdoor-only; good heat output
Solar cooker	Outdoor only	None	Unlimited (sunlight)	Near zero (one-off purchase)	Slow	Unlimited	Sunny climates; extended emergencies
Retained heat cooker	Indoor	None	Depends on method used to bring to boil	Negligible (after boiling)	Very slow (2–8 hrs)	Extreme	Soups, stews, grains; fuel-saving
Candle-based heating	Indoor	Very low	High	Low	Extremely slow	Extremely low	Not viable for cooking — emergency warming only

🔵 Propane and Butane Camp Stoves

Propane and butane camp stoves are the most practical general-purpose emergency cooking method for most households. They behave almost identically to a gas hob, accept standard pots and pans, and require no specialist technique. If you are going to own just one alternative cooking method, this is almost certainly the one to own.

Propane is stored under higher pressure and remains usable in cold temperatures — down to around -40°C (-40°F) for pure propane, though consumer tanks and regulators lose efficiency below -10°C (14°F). It is sold in standard threaded cylinders in most hardware stores, camping suppliers, and large supermarkets worldwide. A standard 450g (1 lb) camping canister provides roughly 1–2 hours of cooking time on a medium flame.

Butane is stored in slim, push-fit cartridges commonly sold for use with single-burner tabletop stoves. It is slightly cheaper than propane per unit, more compact to store, and widely available in Asian supermarkets as well as camping shops. Its significant limitation is cold-weather performance: butane does not vaporise reliably below about 0°C (32°F), making it unsuitable as a primary option in cold climates or winter emergencies.

For most households, a two-burner propane camp stove with a regulator hose and larger 1 kg (2.2 lb) or 5 kg (11 lb) refillable cylinder offers the best balance of cooking capacity and fuel storage. A 5 kg propane cylinder provides roughly 10–14 hours of cooking time, which covers around two weeks of basic meal preparation if used economically.

Indoor use: Propane and butane stoves can be used indoors, but only with meaningful ventilation — a fully open window and ideally a door. Never use them in a windowless room, a sealed caravan, or while sleeping. CO output is lower than charcoal or wood, but not zero, and the cumulative effect in a poorly ventilated space over several hours is significant.

🛒 Gear Pick: The Camp Chef Explorer Two-Burner stove or the Coleman Classic Two-Burner propane stove are the standard benchmarks at this level — both are widely available globally, accept standard propane cylinders, and will outlast a cheap single-burner by years of regular use.

🟠 Rocket Stoves

A rocket stove is a simple combustion device that concentrates a small, hot fire directly beneath a cooking surface using an L-shaped or J-shaped combustion chamber. The design draws air from below, burns fuel completely in a focused burn zone, and channels heat upward with almost no waste. The result is dramatically better fuel efficiency than an open fire — a rocket stove can boil water on a handful of sticks that would accomplish nothing in a campfire.

Rocket stoves are outdoor-only equipment, producing substantial smoke and CO during normal operation. They are, however, one of the best long-term emergency cooking solutions for households with outdoor space, particularly in rural or semi-rural settings where biomass fuel (wood, sticks, dried vegetation) is accessible. A household that can cook indefinitely on freely gathered fuel is not dependent on stored propane or purchased canisters.

The design can be built from bricks, concrete blocks, or clay for near-zero cost, or purchased commercially in lightweight steel or cast-iron versions. A well-built rocket stove will last for years without maintenance beyond clearing the burn chamber.

The limitation is setup time and fuel preparation. You need dry fuel. You need outdoor space. And you need the willingness to tend a fire, which is less convenient than turning a dial. In sustained emergencies — several weeks or more — that inconvenience matters far less than fuel independence.

The article Building and Using a Rocket Stove: Step-by-Step Guide covers construction, materials, and cooking technique in full.

🟡 Open Wood Fire

An open wood fire is the oldest cooking method in human history and, in an extended emergency, possibly the most reliable one — provided you have outdoor space and available fuel. It requires no purchased consumables beyond an ignition source, produces heat for both cooking and warmth, and scales from a small cooking fire to a camp-style setup depending on your needs.

The practical disadvantages are real, however. An open fire is fuel-inefficient — most of the heat radiates outward rather than upward to your pot. It takes time to establish, requires dry fuel, and is weather-dependent. Cooking over an open fire requires practice; an untrained cook will waste fuel and time. And in an urban or suburban emergency, open fires in gardens raise questions about smoke, neighbours, and local regulations.

For long-term resilience in areas with access to wood, an open fire supplemented by a wood stove or rocket stove arrangement is a practical combination. For short-term urban emergencies, it is rarely the right primary method.

Wood storage: If wood fire is part of your plan, store a season’s worth of dry, split hardwood in a covered outdoor space. Wet or green wood burns poorly, produces excessive smoke, and is almost impossible to cook on efficiently.

⚫ Charcoal Grills

Charcoal delivers high, consistent heat, is widely available before emergencies (most supermarkets carry it), and is inexpensive per kilogram. It excels at grilling and can sustain long, steady heat for slow cooking. In purely outdoor terms, it is an excellent emergency cooking tool — the kind of setup that can feed a family a hot meal with minimal equipment.

It is also the most dangerous method on this list when used incorrectly.

For preparedness purposes, charcoal suits households with reliable outdoor space — a garden, a patio, or a balcony large enough to position a grill away from open windows or doors. A bag of charcoal, a simple kettle grill or hibachi, and some firelighters represent a very cheap emergency cooking insurance policy — as long as the outdoor requirement is inviolable.

Fuel storage consideration: charcoal absorbs moisture and becomes difficult to light if stored in a damp location. Keep it in sealed, waterproof bags or a sealed container in a dry area.

🟣 Alcohol Stoves

An alcohol stove burns methylated spirits (denatured alcohol), ethanol, or isopropyl alcohol. The design is simple: a small metal burner with no moving parts, a fuel bottle, and a pot stand. The most refined commercial example is the Trangia system, which has been produced in Sweden since the 1950s and remains a benchmark for simplicity and reliability.

Alcohol stoves produce a clean, near-invisible flame with very low CO output — the lowest of any combustion method on this list. Methylated spirits are available from hardware stores, supermarkets, and petrol stations in most countries under various names (denatured alcohol, spirit fuel, meths). Storage is straightforward: alcohol fuel in sealed metal or HDPE bottles keeps indefinitely.

The significant drawback is heat output. Alcohol has roughly half the energy density of butane per litre. Boiling 500 ml of water on an alcohol stove takes two to three times longer than on a propane stove. In cold conditions, performance drops further. Alcohol stoves are an effective solo or small-household option for simple cooking tasks — boiling water for rehydrating food, making hot drinks, heating small meals — but feeding a family on one is slow and fuel-intensive.

For indoor emergency use, alcohol stoves are among the safer options when used with ventilation. The low CO output and controllable flame make them more forgiving than gas stoves in a semi-enclosed space, though open windows remain necessary.

🛒 Gear Pick: The Trangia 25 or Trangia 27 stove set includes burner, windshield, pots, and a lid that doubles as a frying pan — a complete cooking system that packs flat and has no failure modes short of losing the fuel bottle.

🔴 Backpacking Canister Stoves

Backpacking stoves designed for isobutane/propane blended canisters — brands like MSR, Jetboil, Primus, and Snow Peak — represent the highest fuel efficiency available in a small portable package. A Jetboil Flash can boil 1 litre of water in under two minutes on a single canister that weighs 100g (3.5 oz). At that efficiency, a modest cache of canisters covers a significant duration of basic hot-meal preparation.

The trade-off is canister availability. Unlike standard propane cylinders, isobutane canisters are sold primarily in outdoor and camping shops, not supermarkets or hardware stores. In a widespread emergency, these shops may be out of stock quickly. Backpacking stoves are an excellent secondary or supplementary cooking method — efficient, low-maintenance, and reliable — but a household dependent solely on them faces supply uncertainty in a prolonged crisis.

Most backpacking stoves are designed for one or two people. They heat small volumes quickly but are not suited to cooking large-batch meals. For a single person or a couple, they are highly practical. For a family of four cooking a pot of rice, they require patience.

Indoor use: Like propane stoves, backpacking stoves can be used indoors with open-window ventilation. CO output is low but present; the small flame and enclosed setting of a kitchen make ventilation non-negotiable.

☀️ Solar Cookers

A solar cooker uses reflected or concentrated sunlight to cook food with no fuel at all. The primary designs are the box cooker (an insulated box with reflective panels that achieves temperatures of 90–120°C / 195–250°F), the parabolic cooker (a curved reflector that concentrates heat to a single point, reaching 200–300°C / 390–570°F), and the panel cooker (a lightweight folding version with moderate temperatures and lower cost).

The appeal for long-term preparedness is significant: once purchased, a solar cooker operates at zero ongoing cost, produces no CO, requires no stored fuel, and can cook full meals including rice, beans, bread, and meat. A parabolic cooker can boil water, fry eggs, and even bake. The GoSun Sport, a vacuum-tube design that concentrates solar energy around a central cooking chamber, can cook a full meal in 20–30 minutes under direct sun and continues cooking even in partial cloud.

The limitations are equally significant. Solar cooking is entirely weather-dependent. In a winter storm, in heavy cloud cover, or in a region with limited sun hours, a solar cooker is not a cooking method — it is a decorative object. It also requires outdoor use and direct positioning relative to the sun, which changes throughout the day and requires adjustment.

For preparedness purposes, solar is best understood as a supplementary method in sunny climates and seasons, not a standalone primary cooking system. Paired with a propane stove for cloudy days and nights, a solar cooker eliminates a meaningful proportion of fuel consumption over an extended emergency.

🛒 Gear Pick: The GoSun Sport is compact, durable, and works in partial cloud — a credible upgrade from basic panel designs. For box-style cooking at lower cost, the Sport or a locally made insulated box cooker are both proven options in preparedness contexts.

🌡️ Retained Heat Cookers (Wonder Box / Thermal Cooker)

A retained heat cooker is not a heat source — it is a heat trap. Food is brought to a full boil on any cooking method for the required minimum time (typically 5–15 minutes depending on the food), then transferred immediately into a heavily insulated container that holds the cooking temperature for two to eight hours while the food finishes cooking through its own retained heat.

The concept is simple physics: boiling water transfers enough thermal energy to a pot of food that, if that energy cannot escape, the food continues cooking at safe temperatures without any additional fuel. Commercial thermal cookers (Wonderbag, Shuttle Chef, Thermos cooking pots) achieve this with insulated sleeves or vacuum layers. Improvised versions using sleeping bags, insulated boxes, or layers of blankets work nearly as well.

The fuel saving is extraordinary. A meal that would require 40–60 minutes of simmering — dried beans, rice, a stew — uses only the fuel required to bring it to the boil. In fuel-scarce conditions, this extends your propane or alcohol supply by a factor of three to five.

Retained heat cooking does require planning and timing. You cannot check or stir the food once it is inside the insulator. Timing needs to be calibrated to the dish — undercooking is a risk with dried legumes if the initial boil is too short. And it does not suit high-heat cooking methods like frying or stir-frying.

💡 Tip: An insulated bag or cooler box lined with folded blankets makes a serviceable retained heat cooker at zero cost. Put your covered pot inside immediately after the initial boil, pack insulation tightly around all sides, and leave it undisturbed for the recommended cooking time.

🕯️ Candle-Based Heating: The Honest Assessment

Candle-based cooking setups — typically multiple tea lights placed beneath a small terracotta pot with a metal rack, sometimes called a “flower pot heater” — appear regularly in emergency preparedness guides and social media posts. The claim is that they can cook food or meaningfully heat a room.

The reality is more limited. A standard tea light produces roughly 30–40 watts of heat. A typical stovetop burner operates at 1,000–2,000 watts. The arithmetic is unforgiving: you would need 30–50 tea lights burning simultaneously to match a single low burner setting, and even then, the heat distribution would be wildly inefficient. Boiling a small amount of water with candles is possible in theory, but it takes 45–90 minutes, consumes a significant number of candles, and creates a fire hazard if the setup is unstable.

Candles are genuinely useful in a power outage — for light, for modest localised warmth, and for morale. They are not a viable cooking method. Including them in your cooking plans as a primary or even secondary option will leave you hungry.

The one partial exception is warming pre-cooked food — not cooking it. A small amount of canned food or liquid can be warmed to safe temperatures over a cluster of candles given enough time and a very small vessel. In a scenario with no other option at all, this is better than cold food. It is not a system to plan around.

🏠 Choosing the Right Method for Your Living Situation

The method comparison table above tells you what each system can do. What it cannot tell you is which ones are appropriate for your specific circumstances. The decision tree below addresses that directly.

Do you have outdoor space (garden, patio, balcony)?
│
├── YES
│   ├── Do you have access to free or cheap wood/biomass?
│   │   ├── YES → Rocket stove (primary) + propane stove (backup)
│   │   └── NO  → Propane stove (primary) + charcoal (secondary)
│   │
│   └── Is your climate reliably sunny?
│       ├── YES → Add solar cooker to any of the above
│       └── NO  → Solar cooker as warm-season supplement only
│
└── NO (apartment / indoor-only)
    ├── Is ventilation (open window) always available?
    │   ├── YES → Propane or butane stove (ventilated) +
    │   │         alcohol stove (low CO) +
    │   │         retained heat cooker (zero CO after boil)
    │   └── NO  → Retained heat cooker ONLY
    │             (requires initial boil from any vented method)
    │
    └── Is long-term fuel storage possible?
        ├── YES → Propane canister cache + Trangia alcohol stove
        └── NO  → Small butane tabletop stove (compact canisters)
                  + retained heat cooker

For apartment and urban dwellers, the retained heat cooker is underappreciated and undersold. It addresses the core problem of indoor alternative cooking — CO risk from combustion — by minimising the time any burner is in use. A brief, well-ventilated boil followed by several hours in an insulated box produces a cooked meal with five minutes of actual burner time.

The article Fire Safety When Cooking Indoors During a Power Outage covers the specific indoor risks, safe setups, and ventilation standards in detail — essential reading before using any combustion method inside your home.

💰 Cost and Storage Planning

One of the clearest differences between emergency cooking methods is what it costs to establish a working system and maintain a meaningful fuel reserve.

Initial setup costs (approximate):

Method	Basic Setup Cost	2-Week Fuel Reserve Cost
Propane camp stove + cylinder	$40–80 / £30–60	$20–40 / £15–30 (2× 5 kg cylinders)
Butane tabletop stove	$20–40 / £15–30	$15–25 / £10–20 (12–15 canisters)
Alcohol stove (Trangia)	$40–70 / £30–55	$15–25 / £10–20 (3–4 litres of meths)
Backpacking canister stove	$60–120 / £45–90	$25–50 / £20–40 (4–6 isobutane canisters)
Rocket stove (DIY)	$0–20 / £0–15	$0 (gathered wood)
Rocket stove (commercial)	$60–150 / £45–110	$0 (gathered wood)
Charcoal grill (basic)	$25–60 / £20–45	$15–25 / £10–20 (two 5 kg bags)
Solar cooker (GoSun Sport)	$150–200 / £120–160	$0 (sunlight)
Retained heat cooker (Wonderbag)	$30–50 / £25–40	$0 (requires boil source)

The retained heat cooker and rocket stove are the standout value options over an extended emergency. The charcoal grill is the cheapest functional outdoor setup. The solar cooker has the highest upfront cost but the lowest ongoing cost of any method.

For most households, the right answer is not one method but two: a propane camp stove as the general-purpose workhorse and a retained heat cooker to extend its fuel efficiency. That combination covers indoor use with ventilation, requires reasonable fuel storage, and produces normal meals rather than just boiled water.

📦 Fuel Storage: Key Principles

Whatever methods you choose, fuel storage follows a few consistent principles that apply regardless of the type.

Propane cylinders should be stored upright, outdoors or in a well-ventilated area away from ignition sources. They are safe in a garden shed but not in an enclosed basement. Inspect valves periodically and replace any cylinder that shows rust or corrosion around the valve assembly.

Butane canisters store well in cool, dry conditions. Heat accelerates pressure build-up — do not store them in a hot car or conservatory in summer. They have no practical shelf life limitation when stored correctly.

Methylated spirits and alcohol fuels are flammable liquids and should be stored in sealed metal or HDPE containers in a cool location away from ignition sources. A litre of methylated spirits in a properly sealed container can be stored for years without degradation.

Isobutane canisters have a manufacturer-stated shelf life of around ten years when unused. Partially used canisters can leak from the valve over time — use them fully or invest in a canister sealer adapter.

Charcoal should be kept in sealed, moisture-proof bags. Once damp, it may not relight without significant effort, and poorly stored charcoal is one of the most common causes of failed emergency cooking setups.

💡 Tip: Label every fuel container with the date of purchase or last top-up. A simple rotation system — using the oldest stock first and replacing it — ensures your fuel reserve stays fresh and you never discover a nearly empty cylinder when you need it most.

❓ Frequently Asked Questions

Q: What are the safest ways to cook indoors during a power outage? A: The safest indoor options are an alcohol stove (very low CO output, use with window open), a propane or butane stove (low–moderate CO, requires open-window ventilation), and a retained heat cooker (zero CO once the pot leaves the boil source). Never use charcoal, wood fires, or any solid fuel indoors — these produce lethal quantities of CO in enclosed spaces. A battery-powered CO detector is non-negotiable when using any combustion method indoors.

Q: Which emergency cooking method uses the least fuel? A: A retained heat cooker uses the least fuel of any method, because food cooks in residual heat with the burner off. Combined with a propane or backpacking stove to bring food to the boil, it can reduce fuel consumption by 70–80% compared to simmering on the burner throughout. For methods that require continuous fuel, backpacking canister stoves are the most efficient per unit of heat delivered.

Q: Can you cook indoors on a camping stove safely? A: A propane or butane camp stove can be used indoors with precautions: open at least one window fully, never cook in a windowless space, keep sessions short, and have a battery-powered CO detector operating nearby. “Safely” is conditional — the risk is manageable with ventilation, not eliminated. Alcohol stoves carry a lower CO risk and are somewhat more forgiving, but ventilation is still required for any combustion method.

Q: What is the cheapest emergency cooking setup? A: For outdoor use, a DIY rocket stove built from bricks or concrete blocks costs almost nothing and burns free biomass fuel indefinitely — the cheapest functional emergency cooking system available. For indoor use on a budget, a butane tabletop stove plus a small supply of canisters provides a complete setup for under $30–40 / £25–30, with canisters costing roughly $1–2 / £1–1.50 each.

Q: Which cooking method works best in an apartment with no outdoor space? A: A butane or propane camp stove (used with an open window) combined with a retained heat cooker is the most practical apartment setup. The camp stove handles the initial boil quickly, and the thermal cooker finishes the meal without any further fuel use or CO risk. This combination minimises both indoor combustion time and total fuel consumption. Avoid any solid fuel method — wood, charcoal, biomass — entirely in an apartment context.

💭 Final Thoughts

There is a tendency, in preparedness thinking, to treat the question of how to cook without electricity or gas as a gear problem — the right stove, the right fuel, the right number of canisters. It is partly that. But the more important part is the decision-making framework you have in place before anything goes wrong.

Every method covered in this article has a context in which it is the right answer. Charcoal is excellent — outdoors. A rocket stove is brilliant — with dry wood and space to use it. Solar is transformative — when the sun is out. The error is not choosing any of these methods. The error is applying them in the wrong context, either through lack of preparation or the pressure to improvise in a moment of need.

The households that handle power outages well are not necessarily the ones with the most equipment. They are the ones who decided, in advance and without urgency, which two methods they would rely on, tested them at least once before the emergency, stored an appropriate fuel reserve, and know exactly where the CO detector is. That combination of preparation and simplicity outperforms any amount of expensive gear used for the first time by someone who is already stressed, cold, and hungry.