Cook With Less Energy: Lids, Batch Cooking and Smaller Appliances
You don't need a new stove to cook more efficiently. A lid, the right pot and a little planning do most of the work.
- Put a lid on the pot so water boils faster and simmers with less heat.
- Match the pot to the burner, and boil only the water you need.
- Turn off electric burners or the oven a few minutes early and let residual heat finish the job.
- Keep the oven door shut, and cook several dishes at once when it's on.
- Use the microwave or toaster oven for small portions, and thaw food in the fridge overnight.
Most kitchen energy advice starts with "buy a new stove." This one starts with the lid sitting in your cabinet. The habits below cost nothing, work on gas and electric, and make weeknight cooking a little faster too.
There's an optional upgrade box near the end. You can skip it and still cut your cooking energy with what you own.
Why it's worth changing how you cook
Every minute a burner or oven runs longer than it needs to is energy you pay for, and on a hot day it's heat your air conditioner then has to remove. Efficient cooking tends to be faster cooking, so dinner comes sooner and the kitchen stays cooler.
The free way, step by step
Step 1: Put a lid on it
An uncovered pot loses a lot of heat to the air as steam. Cover it and the heat stays in the water, so it comes to a boil faster. Once it's boiling, a lid lets you drop the burner lower and still hold a simmer.
No matching lid? A baking sheet or slightly larger lid works for bringing water to a boil. Use a potholder when you lift it; trapped steam comes out hot.
Step 2: Match the pot to the burner
A small pot on a big electric coil lets heat spill out around the edges. A big pot on a tiny burner takes forever. Pick the burner that's closest to the size of the pan's bottom. On gas, keep the flame under the pan. If it's licking up the sides, turn it down. You're heating the air and the handle instead of the food.
Flat-bottomed pans also make better contact with electric coils and smooth tops, where a warped pan wastes heat.
Step 3: Boil only the water you need
Filling the pasta pot to the brim or the kettle to the top means heating water you'll pour down the drain. Pasta needs enough water to keep it moving, not a lake. For tea, fill the kettle for the cups you're making.
Step 4: Let residual heat finish the job
Electric burners and ovens stay hot for a while after you switch them off. Use that. Turn off an electric burner a few minutes before the rice or pasta is done and let it coast. Switch off the oven a few minutes before a casserole or roasted vegetables are finished and leave the door closed.
This works best on electric coils, radiant smooth tops and ovens. Gas burners and induction cooktops stop heating almost immediately, so on those the lid does more of the work.
Safety: A turned-off electric burner is still hot. Keep pot handles turned inward, don't set anything on the element, and make sure kids know a dark burner isn't a cool one. For meat, poultry and eggs, check that food reaches a safe internal temperature with a thermometer rather than guessing.
Step 5: Stop peeking in the oven
Every time you open the oven door, hot air rushes out and the oven has to heat back up. Use the light and window instead, and set a timer so you only open the door to check doneness.
Step 6: Batch cook and fill the oven
The oven has to heat the same big box whether it holds one dish or three. So when it's on, make it count. Roast two trays of vegetables instead of one. Bake the chicken and the sweet potatoes together. Toast a tray of nuts or granola on the lower rack while dinner bakes.
Batch cooking on the weekend is the same idea stretched over a week. Cook a big pot of grains, beans or soup once and reheat portions later in the microwave. It saves time on busy evenings, too. Our meal planning guide covers how to plan batches so nothing goes to waste.
Tip: Leave a little space between pans and the oven walls so hot air can circulate. A crammed oven cooks unevenly.
Step 7: Use the smallest appliance that fits the job
For small meals, small appliances win. A microwave, toaster oven, air fryer or pressure cooker generally uses less energy than heating a full-size oven for one or two portions. They heat a smaller space, and they heat up faster.
- Microwave: reheating leftovers, steaming vegetables, baking a potato, cooking oatmeal.
- Toaster oven: a few pieces of toast, a small tray of roasted vegetables, reheating pizza so it stays crisp.
- Pressure cooker or multicooker: dried beans, stews and tough cuts of meat that would otherwise simmer or braise for hours.
Step 8: Thaw in the fridge overnight
Defrosting in the microwave uses energy and often starts cooking the edges. Moving tomorrow's dinner to the fridge the night before costs nothing. Set it on a plate to catch drips.
Step 9: Keep burners and pans clean
Crusted-on grime on drip pans and pan bottoms gets in the way of heat transfer, and clogged gas burner ports make a weak, uneven flame. Give things a quick wipe once the stove has cooled.
Mistakes that waste energy
- Preheating longer than needed. Most ovens signal when they're up to temperature. Put the food in then.
- Boiling on high, then forgetting to turn it down. Once the pot is at a rolling boil, lower the heat. It won't cook any faster at full blast.
- Leaving small appliances plugged in 24/7. Some draw a little power even when off. Our phantom power guide shows which ones matter.
When the upgrade is worth it (and when it isn't)
An electric kettle is worth it if you boil water every day for tea, coffee, oatmeal or pasta. It heats only the water inside it, gets there quickly, and shuts off on its own. A multicooker makes sense if you cook beans, stews or grains often, or if you like set-it-and-forget-it meals. It's less useful if you mostly sauté and grill.
A universal lid is the easy pick if you already own pots with missing lids. If your pots all have lids and your microwave handles the small stuff, the free habits are enough. Thinking about the stove itself? Our comparison of electric vs. gas stoves walks through the bigger picture.
The short version
Lid on. Right-size burner. Only the water you need. Coast on leftover heat, keep the oven shut, and use the smallest appliance for small jobs. None of it costs a thing.
Common questions
Does putting a lid on a pot make water boil faster?
Yes. An uncovered pot loses a lot of heat as steam escapes into the air. A lid keeps that heat in the pot, so the water comes to a boil faster. Once it's boiling, the lid also lets you hold a simmer at a lower burner setting, which saves energy for the rest of the cooking time.
Is it cheaper to use a microwave or an oven?
For small portions, the microwave generally uses less energy than heating a full-size oven. It heats the food rather than a large box of air, and it works quickly. For big batches that fill the oven, the full oven can make more sense. Match the appliance to the size of the job.
Can I turn off the oven early and let it keep cooking?
Often, yes. Ovens stay hot for a while after you switch them off, so you can turn it off a few minutes before a casserole or roast is done and leave the door closed. Check meat, poultry and eggs with a food thermometer to make sure they reach a safe internal temperature.
Does an electric kettle use less energy than the stove?
An electric kettle heats only the water inside it and shuts off when it boils, so it tends to be an efficient way to boil water, especially compared with an electric coil where heat escapes around the pot. Filling it with just the water you need matters as much as the appliance.
Is it OK to thaw food in the fridge overnight?
Yes, and it's one of the safest ways to thaw. Move the food from the freezer to the fridge the night before, set it on a plate or in a container to catch drips, and cook it once it's thawed. Larger items like a whole chicken may need more than one night.