Instant Pot Slow Cooking: Yes, It Works

Yes, you can use an Instant Pot for slow cooking. The Instant Pot has a dedicated Slow Cook function that works like a traditional slow cooker, though with some differences in heat levels and timing. This article explains how to use it correctly, what to expect, and how to get the best results.

What Is the Instant Pot Slow Cook Function?

The Instant Pot is a multi-cooker that combines pressure cooking, sautéing, rice cooking, steaming, and slow cooking in one appliance. The Slow Cook setting uses the inner pot’s heating element to maintain a steady, low temperature over several hours, similar to a standalone Crock-Pot or other slow cooker. It does not use pressure—the lid is left off or set to vent, and the food cooks slowly in its own juices.

Most Instant Pot models have two slow cook heat levels: Low and High. Some newer models also have a Medium setting. The Low setting is roughly equivalent to a traditional slow cooker’s Low, and High is similar to High, but the Instant Pot’s heating element cycles differently, so cooking times may vary slightly.

How to Use the Slow Cook Setting

Using the Slow Cook function is straightforward, but there are a few key steps to get right:

Add your ingredients to the inner pot. Do not fill more than two-thirds full for best results.
Place the lid on and turn it to the Venting position (not Sealing). Some models allow the lid to be left off, but venting is safer and retains heat.
Press the Slow Cook button, then adjust the temperature (Low or High) and set the time using the + or – buttons. The time can range from 30 minutes to 20 hours.
When cooking is done, the Instant Pot will switch to Keep Warm automatically. You can turn this off if you prefer.

Because the Instant Pot’s heating element is more powerful than a traditional slow cooker’s, it can reach a simmer faster. This means that on Low, it may cook slightly hotter than a standard slow cooker on Low. Many users find they need to reduce cooking time by about 10–20% or use the Low setting when a recipe calls for High.

Differences Between Instant Pot and a Traditional Slow Cooker

The most notable difference is the heating mechanism. A traditional slow cooker uses a ceramic or stoneware pot that heats from the sides, creating a gentle, even heat. The Instant Pot uses a stainless steel inner pot that heats from the bottom, which can cause hot spots and faster evaporation.

Another difference is the lid. Traditional slow cookers have a glass lid that seals loosely, allowing some steam to escape. The Instant Pot’s lid, even when vented, seals more tightly, so less moisture escapes. This can result in slightly more liquid in the final dish. To compensate, you may need to reduce the liquid in a recipe by about 1/4 cup (60 ml) or use the lid ajar to let steam out.

Temperature accuracy also varies. The Instant Pot’s Low is often closer to a traditional slow cooker’s High, so you may need to experiment with your specific model. A good starting point is to use Low for recipes that call for Low, but check the food an hour before the expected finish time.

Choosing the Right Instant Pot Model for Slow Cooking

All Instant Pot models have the Slow Cook function, but some are better suited for slow cooking than others. The main factors are size and features:

Size: Instant Pots come in 3-quart, 6-quart, 8-quart, and 10-quart sizes. A 6-quart is the most popular and fits most recipes. If you cook for a large family, an 8-quart gives more room, but it takes longer to heat and may not cook small batches evenly.
Lid: Some models, like the Instant Pot Ultra and Duo Plus, have a lid that can be left in the open position, which is convenient for slow cooking. Others require you to remove the lid or set it to vent.
Temperature settings: Newer models (like the Pro and Duo Crisp) have a Medium slow cook setting, which gives more control. If you plan to slow cook often, look for a model with at least Low, Medium, and High.

If you already own an Instant Pot, there’s no need to buy a separate slow cooker—the function works well for most dishes. However, if you slow cook very frequently and value the hands-off simplicity of a traditional slow cooker, you might still prefer a dedicated appliance.

Common Problems and How to Avoid Them

Users often report a few issues when slow cooking in an Instant Pot:

Food not cooking fast enough: If the food is not done by the expected time, it may be because the Instant Pot’s Low is not as hot as a traditional slow cooker’s Low. Try using High or extending the cooking time.
Too much liquid: Because the lid seals tightly, less steam escapes. Reduce the liquid by 1/4 cup (60 ml) or leave the lid slightly ajar to let steam out.
Burning on the bottom: The bottom heating element can cause scorching, especially with thick sauces or dairy. Stir occasionally and avoid cooking on High for long periods with dairy-based sauces.
Watery results: If you use a recipe designed for a traditional slow cooker, the Instant Pot may produce more condensation. Use less liquid and consider removing the lid for the last 30 minutes to thicken.

Most of these issues are easily fixed by adjusting the time, liquid, or heat level. It may take a few tries to find the perfect settings for your favorite recipes.

Instant Pot vs. Slow Cooker: Which Is Better?

The choice depends on your cooking style and needs. Here’s a comparison:

Speed: The Instant Pot pressure cooks much faster than a slow cooker. If you forget to start dinner, the Instant Pot can cook a pot roast in about 1 hour, while a slow cooker takes 8 hours.
Versatility: The Instant Pot can also sauté, steam, rice, and even make yogurt. A slow cooker is limited to slow cooking.
Ease of use: A slow cooker is simpler—just set it and forget it. The Instant Pot has more buttons and settings, which can be intimidating at first.
Texture: Slow cookers are better for dishes that need long, gentle cooking, like pulled pork or stews, because they don’t boil. The Instant Pot’s slow cook function can be a bit harsher, but it still works for most recipes.

If you already own an Instant Pot, you can skip buying a separate slow cooker. If you only slow cook and never pressure cook, a dedicated slow cooker might be more intuitive and cheaper.

Costs and Energy Considerations

Instant Pots range from about $60 to $200 depending on size and features. A basic 6-quart model is often around $100. In contrast, a traditional slow cooker costs between $20 and $80. If you don’t already own an Instant Pot, buying one just for slow cooking is more expensive, but it also gives you pressure cooking and other functions.

Energy-wise, both appliances are relatively efficient. Slow cookers use about 75–150 watts, while the Instant Pot uses about 1000 watts when heating, but it cycles on and off, so the average power draw during slow cooking is similar to a slow cooker. Over an 8-hour cook, the cost difference is minimal—likely less than $0.10.

Safety and Food Handling

When slow cooking, it’s important to follow food safety guidelines to prevent foodborne illness. The USDA recommends that slow cookers maintain a temperature between 140°F (60°C) and 165°F (74°C) to keep food safe. The Instant Pot’s Slow Cook setting should maintain a safe temperature, but it’s wise to check the internal temperature of meat before serving.

For example, chicken and turkey should reach a safe minimum internal temperature of 165°F (74°C), ground meats 160°F (71°C), and whole cuts of beef, pork, veal, and lamb 145°F (63°C) with a 3-minute rest. Use a food thermometer to verify.

Never leave perishable food out at room temperature for more than 2 hours. After cooking, refrigerate leftovers within 2 hours, and they will keep for 3–4 days. Reheat leftovers to 165°F (74°C) before eating.

Also, always use the inner stainless steel pot for slow cooking—do not put the outer housing in water or use it without the inner pot.

Frequently Asked Questions

Can I leave my Instant Pot on slow cook overnight?

Yes, you can leave it on Slow Cook overnight, as long as you set the timer and the pot is in a safe location. The appliance is designed for unattended cooking, and the Keep Warm function will maintain a safe temperature after cooking. However, always check the food’s internal temperature before eating, and be cautious with foods that contain dairy or thick sauces, as they can curdle or burn if cooked too long.

Do I need to use the lid on the Instant Pot for slow cooking?

You can use the lid, but it must be set to Venting, not Sealing. If you leave the lid off, heat escapes and cooking times may increase. Using the lid with the vent open helps retain heat and moisture while allowing some steam to escape. Some models have a lid that can be locked in the open position, which is convenient.

Why is my Instant Pot slow cook not hot enough?

The Instant Pot’s Low setting may be cooler than a traditional slow cooker’s Low. If your food isn’t cooking as expected, switch to High or increase the cooking time. Also, make sure the inner pot is properly seated and the lid is on with the vent open. If the pot is too full, it may take longer to heat.

Can I use my regular slow cooker recipes in the Instant Pot?

Yes, but you may need to adjust the liquid and cooking time. Because the Instant Pot’s lid seals tighter, less moisture escapes, so reduce liquids by about 1/4 cup (60 ml). Also, check the food earlier than the recipe suggests, as the Instant Pot may cook faster on Low. Start with a shorter time and add more if needed.

Is the Instant Pot slow cooker as good as a Crock-Pot?

Many users find it comparable, but not identical. The Instant Pot’s slow cook function works well for most recipes, but the heating element is different, so results can vary. Some dishes, like slow-cooked beans or stews, may turn out slightly different in texture. If you’re a slow-cooking purist, a dedicated slow cooker might be more consistent, but the Instant Pot is a capable alternative.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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