5 Brilliant Ways to Thicken Slow Cooker Soups, Stews & Sauces (2024)

Meghan Splawn

Meghan Splawn

Meghan was the Food Editor for Kitchn's Skills content. She's a master of everyday baking, family cooking, and harnessing good light. Meghan approaches food with an eye towards budgeting — both time and money — and having fun. Meghan has a baking and pastry degree, and spent the first 10 years of her career as part of Alton Brown's culinary team. She co-hosts a weekly podcast about food and family called Didn't I Just Feed You.

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updated Feb 28, 2024

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5 Brilliant Ways to Thicken Slow Cooker Soups, Stews & Sauces (1)

In This Article

  1. 1. Prop the lid up for evaporation.
  2. 2. Purée your soup or stew a little.
  3. 3. Add a slurry at the end.
  4. 4. Enrich with canned milk.
  5. 5. Add a little starch.

Cooler weather means soup season is officially here. And while we love slow cooker soups, stews, and saucy braises of all kinds, the slow cooker brings its own set of challenges when it comes to getting that creamy, comforting soup texture just right.

Slow cookers that heat as low and slow, as their name implies, rely on heat that’s captured by their lid being in place. That means there is no evaporation happening, like with stovetop soups. But we have a few smart tricks for thickening even the most finicky slow cooker soups.

1. Prop the lid up for evaporation.

This tip actually comes from our slow cooker fruit butter, but it also works really well for stews and braises — like chili and chicken tinga. While your dinner cooks, prop the lid open a bit so that moisture can escape and thicken the stew naturally without extending the cooking time too much. Skewers or chopsticks between the lid and the crock of the slow cooker work well for this.

2. Purée your soup or stew a little.

Have a vegetable soup that turned a little watery while cooking? All you need is a blender and a minute to purée. If you’ve got an immersion blender, you can stick it directly into the soup to purée. Otherwise, remove a cup or two of the soup, pour it in your blender, and carefully blend until smooth. Return the blended soup to the slow cooker and give it all a stir — and you’ll have thicker soup.

3. Add a slurry at the end.

A slurry is a mixture of flour and water, whisked together until smooth and added towards the end of cooking; it’s a super-simple way to thicken any soup. For slow cooker soups, add your slurry with at least 30 minutes of cook time left so that the raw flour can cook and thicken the soup. Need a gluten-free option? You can make a slurry from puréed white beans, too.

4. Enrich with canned milk.

Cream is one of the most delicious ways to thicken a soup — all that rich milk fat helps to emulsify the soup and make it even creamier. Cream can curdle with the long cook time of the slow cooker, so I prefer canned milks like evaporated milk or coconut milk for thickening instead.

5. Add a little starch.

Cornstarch, potato starch, and chickpea flour are a couple of pantry-friendly ways to thicken soups, stews, and sauces in the slow cooker. Just a tablespoon or two of any — added towards the end of cooking — will thicken sauces especially well. Just be sure to mix them with a little water before adding to the slow cooker to prevent clumping.

Do you have a favorite way to thicken slow cooker stews or sauces?

5 Brilliant Ways to Thicken Slow Cooker Soups, Stews & Sauces (2024)

FAQs

5 Brilliant Ways to Thicken Slow Cooker Soups, Stews & Sauces? ›

As a rule of thumb, dissolve 2 parts cold water and 1 part cornstarch. Add the slurry to your sauce as it simmers in the slow cooker. Cornstarch is always a good way to thicken a sauce or soup but personally I would recommend going a different route as the cornstarch slurry may change the flavor of the meal.

How to thicken stews in a slow cooker? ›

As a rule of thumb, dissolve 2 parts cold water and 1 part cornstarch. Add the slurry to your sauce as it simmers in the slow cooker. Cornstarch is always a good way to thicken a sauce or soup but personally I would recommend going a different route as the cornstarch slurry may change the flavor of the meal.

What is the secret ingredient to thicken soup? ›

Add Flour Or Cornstarch

You can thicken soup by adding flour, cornstarch, or another starchy substitute.

Does taking the lid off a slow cooker thicken the sauce? ›

Take the lid off

Place the cooker on a high setting, and open the lid for 30-45 minutes to let excess moisture cook off. The liquid will reduce, leaving you with a thick and delicious gravy or sauce. (Tip: This trick can also be applied for thickening stews, or when you've accidentally added too much liquid.)

What is the most common thickener for soups stews and sauces? ›

Roux is the most common thickener for sauces and soups. The fat serves to “oil” the flour so it does not cause lumps when added to a liquid.

How to thicken sauce from a slow cooker? ›

Cornstarch, potato starch, and chickpea flour are a couple of pantry-friendly ways to thicken soups, stews, and sauces in the slow cooker. Just a tablespoon or two of any — added towards the end of cooking — will thicken sauces especially well.

What is better to thicken, stew flour or cornstarch? ›

Cornstarch has twice the thickening power of flour. When a gravy, sauce, soup or stew recipe calls for flour, use half as much cornstarch to thicken. To thicken hot liquids, first mix cornstarch with a little cold water until smooth. Gradually stir into hot liquid until blended.

What is the 4 other thickening agents for soup? ›

  • Cornstarch. Cornstarch is the most common thickening agent used in the industry. ...
  • Pre-gelatinized Starches. Pre-gelatinized starches are mixed with sugar and then added to the water or juice. ...
  • Arrowroot. ...
  • Agar-Agar. ...
  • Algin (Sodium Alginate) ...
  • Gelatin. ...
  • Gum Arabic or Acacia. ...
  • Gum Tragacanth.

Why put foil under the lid of a slow cooker? ›

The heat bounces off from the lid and allows your food to cook faster. Also, you will not lose any of the steam that usually evaporates.

How to stop food from going watery in a slow cooker? ›

Use flour to thicken sauces

You can roll meat in a small amount of seasoned flour before adding it to the slow cooker or use a little cornflour at the end. If you want to do the latter, take a teaspoon or two of cornflour and mix it to a paste with a little cold water.

Is 4 hours on high the same as 8 hours on low? ›

Low: 7-8 hours to reach the simmer point. High: 3-4 hours to reach the simmer point.

How to thicken soup in a crockpot? ›

Make a slurry.

Just whisk together equal parts cornstarch and water to make a slurry — using about 1 tablespoon cornstarch per cup of liquid in your recipe — then whisk this into your pot. Cook until the sauce begins to thicken.

What is a natural thickener for stew? ›

The flour helps to thicken a stew as it cooks. Whisk a teaspoon of flour in a little cold water to make a slurry, then stir into the stew as it's cooking. Don't add dry flour directly to the stew as it may clump. After adding the slurry, bring the stew to boil.

What is the best ingredient to thicken soup? ›

Soup Thickening Method: Cornstarch Slurry

About this method: One of the most common ways to thicken sauces and soups is with a starch-based slurry, and cornstarch is a popular choice.

How do you make stew less watery? ›

How to Thicken Stew
  1. Add breadcrumbs. One thickening agent that can help thicken a stew is breadcrumbs. ...
  2. Concoct a slurry. A slurry is a mixture of some type of starch, usually cornstarch, and water—use cold water, hot water, or the hot liquid from the stew. ...
  3. Incorporate a purée. ...
  4. Mix in potatoes. ...
  5. Start with a beurre manié.
Jan 14, 2022

How do you thicken leftover stew? ›

Five Thickening Agents for Stew
  1. Make a Roux. Roux is a classic French technique that consists of cooking equal parts flour and fat (usually butter) over a low flame until smooth. ...
  2. Incorporate a Purée. Another option for thickening your stew is to incorporate a purée. ...
  3. Add a Starch. ...
  4. Create a Slurry. ...
  5. Whip Up a Beurre Manié
Aug 15, 2022

Why is my stew in slow cooker still tough? ›

It's because you haven't let the collagen break down. Extend the cook time, make sure there's enough liquid and keep an eye on the dish.

When to add cornstarch to a slow cooker? ›

You can also add cornstarch dissolved in water (1 or 2 tablespoons cornstarch to 2 or 3 tablespoons cold water, depending on how much liquid you have) directly to the slow cooker near the end of cooking to thicken the liquids.

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