What Is an Instant Pot? How It Works and What Every Button Does

An Instant Pot is not a slow cooker with extra buttons. It is an electric pressure cooker with a computer in the base, and that computer is the whole point.

The lid locks and the steam has nowhere to go. Pressure climbs, water gets hotter than it ever could in an open pan, and a three-hour pot roast is done in about an hour.

Short answer: An Instant Pot is a countertop electric pressure cooker with preset programs. A sealed lid traps steam, so pressure rises and water boils well above 212°F. Sensors and a microprocessor hold that pressure for the time you set, then drop the pot to Keep Warm. The same machine also sautés, steams, slow cooks, makes rice and ferments yogurt.

What an Instant Pot Actually Is

Lift the lid off and only four parts really matter.

• The inner pot. A removable stainless steel liner that holds the food.
• The heating element. A flat electric plate in the base, sitting under the liner.
• The lid. It twists into place and locks, and a silicone ring seals the gap.
• The control board. Sensors, a microprocessor, and the buttons on the front.

That control board is the difference between this and the jiggle-top pot your grandmother kept under the sink. Sensors read the temperature at the base and the pressure inside the chamber. The board then switches the element on and off to hold a target. You never stand over a burner adjusting the flame, and the pot will not open while pressure remains inside.

The first Instant Pot went on sale in 2010, and the name soon stuck to the whole category. Plenty of other brands build the same kind of machine now. The best-known rival gets a full comparison in Instant Pot vs Ninja Foodi, and the older stovetop design is covered in Instant Pot vs pressure cooker.

Most 6-quart models pull around 1,000 watts while they heat. That sounds like a lot, but the element cycles off once pressure is reached. The running cost is worked out properly in how many watts an Instant Pot uses.

Why Pressure Makes Food Cook Faster

Water boils at 212°F at sea level. An open pan cannot get hotter than that, no matter how high you crank the burner. Extra heat just makes more steam, and the steam leaves.

Seal the lid and the steam is trapped. Pressure builds, and higher pressure pushes the boiling point up with it. Instant Pot publishes the numbers: high pressure runs 10.2 to 11.6 psi above the surrounding air, and low pressure runs 5.8 to 7.2 psi. A few models add a Max setting at 15 psi. The steam tables used in pressure canning put 10 psi at roughly 240°F.

Those extra thirty degrees change everything about tough food. Collagen in a chuck roast melts into gelatin far sooner. Dried beans soften without an overnight soak. Bones give up their flavour in an hour instead of six, which is why stock is the single best argument for owning one.

Two other things happen inside a sealed pot. Nothing evaporates, so flavour stays in the liquid instead of drifting off with the steam. Pressure also drives liquid into the food, so grains and beans hydrate evenly rather than blowing out at the edges.

There is one catch that surprises new owners. The timer does not start until the pot has reached pressure. A recipe labelled ten minutes can take twenty-five from plug to plate, and cold food or a full pot stretches that preheat further.

Setting	Pressure above air	Found on	What it suits
Low	5.8 to 7.2 psi	Most models	Eggs, delicate fish, soft vegetables
High	10.2 to 11.6 psi	Every model	Meat, beans, stock, grains, most recipes
Max	15 psi	A small number of models	Shaving a few more minutes off beans and stock

What Each Button Really Does

Here is the thing nobody tells you at the shop: most of the buttons are saved settings, not different technology. Pressure Cook is the engine. The presets simply load a time and a pressure level so you do not have to.

Program	What the pot actually does	Reach for it when
Pressure Cook (or Manual)	Seals, builds pressure, holds it for your set time	Braises, stews, beans, stock, grains
Sauté	Runs the element with the lid off, at three heat levels	Browning meat, softening onions, reducing a sauce
Slow Cook	Gentle, steady heat with no pressure at all	Recipes written for a crock pot
Rice	Senses when the water has been absorbed, then stops	White rice and similar short-grain types
Steam	Full heat with no cycling, food held above the water	Vegetables, dumplings, fish fillets
Yogurt	Holds a low warm temperature for hours	Homemade yogurt, and scalding the milk first
Sous Vide	Holds the water bath at a precise low temperature	Duo Plus, Pro and Ultimate models only
Keep Warm	Light heat to hold food at serving temperature	The end of any other program

Sauté is the program people use least and should use most. Browning meat in the same pot before you seal it builds a base of flavour that pressure alone cannot make. Scrape the browned bits loose with a splash of stock before the lid goes on, the same move you would use in a sauté pan.

Rice is the one preset that divides people. It works fine on white rice, but brown rice needs longer and firmer control, so a dedicated machine still wins there. Our guide to the best rice cooker for brown rice explains why, and how to cook rice in a rice cooker covers the ratios.

Steam needs a rack or a basket, because food sitting in the water is boiling, not steaming. A wire trivet comes in the box, but a proper basket holds far more. There are options in our roundup of the best steamer basket for an Instant Pot, and the same rules apply to a bamboo steamer.

Slow Cook is the weakest program on the machine. The element heats from the base only, while a real crock pot heats from the sides too. Owner reviews regularly mention that dishes take longer than the original recipe says. Treat the setting as a backup, not a reason to sell your slow cooker.

The Model Lines, Sorted Out

The naming has changed more than once, which is why shopping for one is confusing. Here is what actually separates the current lines.

Line	Programs	What it adds	Sizes
RIO (the old Duo)	7-in-1	The basic set, lowest price	4, 6, 7.5 quart
Duo Plus	9-in-1	Sous vide, sterilise, a progress bar on the screen	3, 6, 8 quart
Pro	10-in-1	Steel lid, dial control, saveable custom programs	6, 8 quart
Pro Plus	10-in-1	Everything in the Pro, plus app control over Wi-Fi	6 quart
Duo Crisp / Pro Crisp	11-in-1	A second lid that air fries, roasts and dehydrates	6, 8 quart
Duo Crisp Ultimate	13-in-1	One hinged lid that does both jobs, no lid swapping	6.5 quart

The Instant Pot Duo and its newer RIO badge are the same idea: seven functions, no sous vide, no air frying. Owner reviews for both run long and mostly positive, and you can read them on the Duo reviews page if you want the unfiltered version.

Step up to the Duo Plus and you gain sous vide plus a screen that tells you which stage the pot is in. The Instant Pot Pro swaps the plastic lid for stainless steel and lets you save your own programs. Its steam release is also quieter, which matters more in a studio than it sounds.

Size is the choice people get wrong. Six quarts suits most households and has the widest range of accessories. A 3-quart Mini is the better call for one or two people, and it fits where a full pot will not. Our guide to the best small kitchen appliances for cooking for one puts that in context, and best cookware sizes for cooking for one covers the same trap with pots and pans.

Natural Release vs Quick Release

When the timer ends, the pot is still full of pressure. How you let that pressure out changes the food, not just the wait.

Natural release means doing nothing. The pot cools on its own and pressure falls slowly, usually over 10 to 30 minutes. The food keeps cooking gently that whole time, and the liquid settles instead of churning.

Quick release means flipping the valve to vent. Steam shoots out, pressure drops in a minute or two, and the cooking stops almost at once. That sudden drop is exactly why some dishes misbehave.

The reason is physics, not luck. Liquid under pressure is sitting above its normal boiling point. Drop the pressure fast and that liquid flashes into steam all at once, so a starchy soup foams up and spits through the valve. Meat does something similar on the inside, and the fibres tighten as the moisture rushes out.

Dish	Use this release	Why
Pot roast, pulled pork, ribs	Natural, at least 10 minutes	Fibres relax, juice stays in the meat
Dried beans, split peas, lentils	Full natural	Starchy foam clogs and spits on quick release
Soup or stock filled near the line	Full natural	Liquid volume makes foaming worse
Rice and grains	Natural for 10 minutes, then vent	Grains finish absorbing, then stop
Broccoli, green beans, carrots	Quick	Seconds decide the texture
Fish fillets and shrimp	Quick	They overcook almost instantly
Hard-boiled eggs	Quick, then straight into ice water	Stops the yolk turning grey

A halfway option works well for most weeknight meals. Let the pot sit for ten minutes, then vent the rest. Recipes write this as a 10-minute natural release, and it covers meat and rice nicely.

Whatever you use, keep your hand and face clear of the valve, and never put the pot under a low cabinet when venting. The steam leaves hot enough to scald.

The Burn Message and How to Clear It

Nothing kills confidence in a new pot faster than the word BURN flashing while dinner sits half cooked inside. The message is a safety trip, not a breakdown.

The sensor under the inner pot watches the base temperature. If the base runs hotter than a pot of boiling liquid should, the board assumes something is scorching and stops heating. America’s Test Kitchen describes the same trigger and the same fix: check the machine first, then deal with the food.

Common causes, in the order they usually happen:

1. Not enough thin liquid. Steam needs water. Tomato sauce, coconut milk and barbecue sauce are too thick to make it on their own.
2. Stuck fond after sautéing. Browned bits glued to the base read as a hot spot. Deglaze before the lid goes on.
3. Thick sauce stirred through. Layer heavy sauce on top and leave it there. Do not mix it in until after cooking.
4. A dirty or missing sealing ring. Steam escapes, pressure never builds, and the base keeps heating.
5. Something under the inner pot. A stray grain of rice between the liner and the element is enough.

To clear it: press Cancel, release the pressure safely, and open the lid. Scrape the base until it is clean, add about half a cup of water, and restart the program. The inner pot is bare stainless steel, so anything really stuck on comes off with the same tricks in how to clean stainless steel pans. If you are unsure what the liner is made of, what stainless steel cookware is explains how to tell.

How Much Liquid an Instant Pot Needs

Every pressure cooker needs a minimum amount of thin liquid to make steam. Instant Pot lists these by pot size.

Pot size	Minimum thin liquid
3 quart	1 cup
6 quart	1½ cups
8 quart	2 cups
10 quart	2½ cups

Two fill limits matter just as much. Never fill past the two-thirds mark on the liner. For anything that swells or foams, such as rice, oats, pasta or dried beans, stop at half. Going past those lines is how the steam pipe gets blocked.

Cups and quarts trip people up here, so keep how many ounces are in a quart handy if you are scaling a recipe up or down.

What an Instant Pot Is Bad At

A fair explainer has to say where the machine falls down, and this one falls down in predictable places.

• Anything crisp. Wet steam and crisp skin are opposites. Sear before, or finish under a grill.
• Quick vegetables. Broccoli goes from bright to mush in about a minute of overcooking, and you cannot peek.
• Pasta. Starchy foam clogs the valve, and the texture is hard to control.
• Delicate fish. Low pressure helps, but a pan or a steamer basket is easier.
• Steak. Pressure is the wrong tool for anything you want pink in the middle.
• Baking. Cheesecake works because it likes a moist environment. Bread and cookies do not. Use a small oven instead, and our guide to the best small ovens and toaster ovens for baking covers the compact options.
• Recipes you taste and adjust. The lid stays shut, so seasoning happens at the start or at the end.
• Home canning. The National Center for Home Food Preservation says electric multi-cookers should not be used for pressure canning, because they are not tested to hold a verified pressure for a verified time.

It is also worth knowing that slow, gentle cooking is not its strength. If you mostly simmer sauces and melt chocolate, a double boiler or a heavy stockpot with a lid will serve you better than any preset.

Is an Instant Pot an Air Fryer?

No, and this is the single most common mix-up in the whole category.

A pressure cooker works with wet steam. An air fryer works with dry air moving fast. You cannot get both from one sealed lid, so the Crisp models solve it with two lids. You pressure cook with the first, then swap on the air fryer lid to brown the top.

If crisping is what you actually want, a Duo Crisp makes sense. If you want crisping and nothing else, a standalone machine is cheaper and usually better at it. Compare the options in our air fryers under $100 roundup, and see how frozen fries turn out in an air fryer. If countertop ovens are also on your list, read NuWave oven vs air fryers.

Two practical notes on the Crisp lids. They need somewhere to sit while hot, which small kitchens rarely have spare. They also need cleaning after every use, and the basket collects grease quickly, so cleaning an air fryer basket becomes a weekly job. Choosing the right fat helps too, and our guide to the best oil for an air fryer explains smoke points in plain terms.

Is It Worth the Counter Space?

A 6-quart Instant Pot takes up about as much room as a large stockpot and cannot be stacked. In a small kitchen that is a real cost, not a detail.

It earns the space if you cook beans and pulses from dry, make stock, braise cheap cuts, or batch cook on Sundays. Those jobs are slow on a stove and quick under pressure. Our easy meal prep ideas for one person lean on exactly that pattern, and how to stock a small kitchen for solo cooking covers what else you need around it.

It does not earn the space if you mostly cook quick fresh food. In that case a good pan and a sharp knife will beat it every night of the week.

If you buy one and storage is tight, keep the lid inverted on the pot rather than hunting for a separate shelf. These countertop organization ideas help with the footprint. Vertical storage ideas free up wall space for the accessories. And small kitchen cabinet organization ideas make room for the inner pot when the machine is put away. Leftovers need somewhere sensible to live too, which is where airtight food storage containers earn their keep.

On energy, a sealed pot holding 240°F is efficient compared with an oven heating an empty box for an hour. Our guides to reducing kitchen energy use in a small apartment and the most energy-efficient small kitchen appliances put the savings in perspective.

Which Instant Pot Should You Buy?

Skip the model grid and use these four rules instead.

• Cooking for one or two, tight counter: a 3-quart or 4-quart Mini.
• Standard household, no interest in gadgets: a 6-quart RIO or Duo.
• You want sous vide or a quieter release: a 6-quart Duo Plus or Pro.
• You want one machine that also crisps and you have room: a Duo Crisp.

Buy the pot that matches how you already cook, not the one with the most programs. Half the buttons on a 13-in-1 model are time-and-pressure presets you could dial in yourself. The extra functions are only worth paying for when you will use them every week, the same logic we apply in small kitchen gadgets worth buying when you cook for one.

Related Guides

• Instant Pot vs Pressure Cooker: Everything You Need to Know
• Instant Pot vs Ninja Foodi: Which Is Better for Your Kitchen?
• How Many Watts Does an Instant Pot Use?
• 9 Best Steamer Baskets for Instant Pot
• Best Small Kitchen Appliances for Cooking for One
• Best Compact Energy Star Appliances for Small Kitchens
• How to Store Pots and Pans in a Small Kitchen
• How to Choose Energy-Efficient Cookware for a Small Kitchen

Frequently Asked Questions

What exactly is an Instant Pot?

An Instant Pot is a countertop electric pressure cooker with a microprocessor inside. A locking lid and a silicone ring seal the pot, so steam builds pressure and water boils hotter than 212°F. Sensors track the heat and pressure, and the control board holds them steady for the time you set. The same housing also sautés, steams, slow cooks, makes rice and ferments yogurt.

How much faster does an Instant Pot cook?

It depends on the dish, but tough, slow foods gain the most. A chuck roast that needs three hours in the oven is usually tender in about an hour under pressure. Dried beans cook in under an hour with no overnight soak. Quick foods gain almost nothing, because the pot still needs 10 to 20 minutes to reach pressure before the timer even starts.

Is an Instant Pot the same as an air fryer?

No. A standard Instant Pot cooks with wet steam under pressure, which is the opposite of the dry, fast-moving hot air an air fryer uses. Nothing crisps under a sealed pressure lid. Only the Duo Crisp, Pro Crisp and Duo Crisp Ultimate models air fry, and they do it with a second lid that you swap on after the pressure cooking is finished.

Why does my Instant Pot say burn?

The burn message means the sensor at the base read a temperature that is too high for the liquid inside. Usually something is stuck to the bottom of the inner pot, or there is not enough thin liquid to make steam. Cancel the program, release the pressure, open the lid and scrape the base clean. Add about half a cup of water, put thick sauce on top without stirring, and restart.

What is the difference between natural release and quick release?

Natural release means you walk away and let the pot cool on its own, which takes 10 to 30 minutes and keeps cooking the food the whole time. Quick release means flipping the valve to vent, which dumps the steam in a minute or two and stops the cooking. Use natural release for meat, beans and anything foamy. Use quick release for vegetables, fish and pasta.

Which Instant Pot size should I buy?

The 6-quart size fits most households and has the widest choice of accessories and recipes. Pick a 3-quart or 4-quart Mini if you cook for one or two people and counter space is tight. Go to 8 quarts only if you batch cook, make big pots of stock, or feed five or more people. Bigger pots also take longer to come up to pressure.