How to Thicken Soup, According to Our Test Kitchen (2024)

There's nothing more inviting than a big pot of soup simmering on the stove. From seafood chowders to creamy bisques, soup makes the perfect appetizer or main course. But sometimes a recipe doesn't go quite as planned, and you're left with a soup that's not the right consistency. Here, learn how to thicken up soup by using additions like cornstarch, beans and other easy solutions.

Pictured recipe: Cream of Zucchini Soup

How to Thicken Soup with Cornstarch

Cornstarch is a great option as it is a natural thickening agent, but you'll want to be careful about how much you use. Start with 1 tablespoon of cornstarch whisked together with cold water to create a slurry. Then, gradually add the slurry to the soup, letting it boil for one to two minutes before adding more. This method allows you to adjust accordingly as the soup is being thickened (you might not need the entire slurry or you might need more, depending on the viscosity of the soup and the texture you're aiming for). You can also substitute potato starch or rice starch for the cornstarch.

How to Thicken Soup with Flour

Pictured recipe: Creamy Corn Soup with Crispy Bacon

If you don't have cornstarch handy, flour is a similar alternative that can be used to thicken soup (for a gluten-free option, you can also use arrowroot flour). There are a few ways to incorporate flour into soup, which work to avoid clumping and the raw taste of flour. First, you can create a slurry by whisking 2 tablespoons of flour with cold water and adding it gradually to the soup.

Another method of using flour to thicken soup is by making a roux on the stovetop. A roux, which is a mixture of fat and flour, is often used as a base for sauces and is an easy way to add starch. If you're looking for an alternative, you can also make a beurre manié, which is a mixture of flour and butter rubbed together to create a dough or paste. With both methods, you'll want to add them to the soup bit by bit to gauge the soup's thickness.

How to Thicken Soup with Dairy

Another option for thickening soup is by using dairy like sour cream or yogurt. Start with a small dollop and stir before checking the consistency and adding more. We recommend using plain yogurt so you don't alter the taste of the soup. You can also use cream if you prefer.

How to Thicken Soup with Rice, Bread, Potatoes or Beans

Foods like rice, bread, potatoes and beans are naturally high in starches, which, when broken down, act as a thickening agent. With rice, the grains will break down into the soup as it's simmered and stirred, releasing the starches and thickening the soup.

Aside from rice, you can also use bread, potatoes or beans, according to Breana Lai Killeen, M.P.H., RD. Killeen says, "When stirred into soup, stale bread, mashed beans and mashed potatoes cook down to create a creamy, rich texture, all without adding cream. It's also a great way to use up leftovers." If you don't have these ingredients on hand, you could also try using tortillas as a thickener, like in this Chicken Enchilada Soup.

How to Thicken Soup by Blending It

One easy way to thicken soup is by blending it—or part of it, at least. If your soup is packed with vegetables, you can blend part of it to change the texture. The blended vegetables will help thicken the consistency of the soup. To do this, take half of the soup, add it to a blender and blend until smooth (use caution when blending hot liquids; you can also use an immersion blender). Return the blended portion to the soup and stir before eating.

How to Thicken Soup, According to Our Test Kitchen (2024)

FAQs

How to Thicken Soup, According to Our Test Kitchen? ›

Cornstarch is a great option as it is a natural thickening agent, but you'll want to be careful about how much you use. Start with 1 tablespoon of cornstarch whisked together with cold water to create a slurry. Then, gradually add the slurry to the soup, letting it boil for one to two minutes before adding more.

How do you make soup thicker? ›

6 ways to thicken soup:
  1. Blend all or part of it. If you've made a broth with chunks of vegetable in it, such as minestrone soup, then pour the soup through a sieve. ...
  2. Add cream or yogurt. ...
  3. Add flour or cornflour. ...
  4. Use a butter and flour paste. ...
  5. Blend in bread. ...
  6. Add lentils or rice.

What do restaurants use to thicken soup? ›

Beurre Manie. Equal parts flour and soft, pliable butter, these two ingredients are kneaded together until every flour particle is coated with the fat, creating a dough ball known as beurre manie. This thickening agent is perfect for adding shine and viscosity to your sauces, soups, and stews.

Is it better to thicken soup with flour or cornstarch? ›

It's important to note that cornstarch has twice the thickening power of flour. If you need to substitute cornstarch to thicken liquid in a recipe that calls for ¼ cup (four tablespoons) flour, you only need two tablespoons cornstarch.

What is the best way to thin a soup that is too thick? ›

If it's too thick.

All you need to do is add more of the recipe's cooking liquid — such as wine, broth or cream.

What is the secret ingredient to thicken soup? ›

Add Flour Or Cornstarch

Instead, ladle a small amount of broth into a separate bowl and let it cool. Add a few tablespoons of flour or cornstarch to the bowl and whisk until it's blended smooth. Next, bring the soup to a simmer and add the mixture back to the pot. Pro tip: Don't dump in the entire mixture at once.

What is the most commonly used thickening agent? ›

Cornstarch. Cornstarch is the most common thickening agent used in the industry. It is mixed with water or juice and boiled to make fillings and to give a glossy semi-clear finish to products. Commercial cornstarch is made by soaking maize in water containing sulphur dioxide.

What are the two main thickening agents in soup? ›

cooking sauce or soup. Arrowroot starch thickens very quickly and it is unnecessary to bring the mixture to a boil for it to work. Cornstarch, on the other hand, requires heating the mix- ture to a boil to fully thicken the mixture and to avoid any “starchy” taste or texture in the fin- ished product.

What are the 4 ways to thicken a sauce or soup? ›

Ways To Thicken Sauce
  1. Tomato Paste. If your soup or stew is watery, adding tomato paste may help! ...
  2. Arrowroot. You might prefer to avoid gluten in your recipes. ...
  3. Flour. ...
  4. Reduce Your Liquid. ...
  5. Puréed Vegetables. ...
  6. Egg Yolk. ...
  7. Yogurt. ...
  8. Rice.
Jul 15, 2022

What is a natural thickener? ›

Natural food thickeners are substances derived from plants or other natural sources. Examples include agar agar, arrowroot, and chia seeds. They offer a range of unique properties and health benefits.

What happens if you add too much cornstarch to soup? ›

So if you added too much cornstarch, you can always dilute it. with a little bit more chicken stock or water. If you're thinking it too much, it looks like pudding.

How much cornstarch to thicken 4 cups of soup? ›

If you're cooking hot liquids like sauces, stock or broth, 1 tablespoon of corn starch per cup of liquid will give you a thin to medium consistency that's appropriate for soups or very thin sauces. 2 tablespoons per cup will give you a thicker, more gravy-like consistency.

Does simmering thicken soup? ›

Allowing your soup to simmer can help it thicken, since it will help some of the liquid evaporate away. This will work better if you've added a thickening agent, such as cornstarch.

What to do if soup is too watery? ›

6 Ways to Thicken Soups or Stews
  1. Puree the vegetables. The most straightforward way to thicken soup is to puree the vegetables. ...
  2. Mash beans, lentils, rice, or bread. ...
  3. Add some dairy. ...
  4. Add an egg. ...
  5. Whisk in a bit of flour or starch. ...
  6. Blend in some silken tofu.
Nov 15, 2021

How do you thicken soup naturally? ›

One way to thicken a stew without flour is to add some cooked rice or quinoa. Another option is to puree some of the vegetables in the stew to thicken it. To thicken a stew without flour, some recipes call for using a thickener such as arrowroot starch or almond flour.

Does soup thicken covered or uncovered? ›

To thicken a soup, stew, or sauce, leaving the lid uncovered is ideal. "It must be off, or semi-covered, if you are slowing down the reduction process," says Stephen Chavez, chef-instructor at the Institute of Culinary Education.

What makes soup thick and creamy? ›

Add Flour, Cornstarch, or Other Thickener: Starches thicken soup and give it body. Whisk a few tablespoons of starch into a little of the broth in a separate bowl before whisking it into the main pot. This prevents the starch from clumping and helps it dissolve into the soup evenly.

Does soup get thicker the longer you cook it? ›

Many home cooks find themselves wondering how to thicken a soup, and there are a few different ways: cooking the soup longer to remove excess liquid, blending some of the solid ingredients of the soup, or using food scraps like bread or potatoes to thicken the soup, but if you don't have time to wait, you can use a ...

Can you add water to soup if it's too thick? ›

Add extra water as it cooks if the soup seems too thick. 5) Add ingredients that don't need much cooking time such as canned beans, diced cooked meats, shellfish, pasta or cooked rice; about a cup of such addition usually suffices.

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