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 I make my 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.

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 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 the healthiest way to thicken soup? ›

The absolute healthiest way to thicken soup is by using a traditionally made bone broth powder like the one from Bluebird Provisions.
  1. Oat Flour, Quinoa Flour or Chickpea Flour.
  2. Applesauce or Mashed Bananas.
  3. Eggs.

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 ...

What are 5 methods of thickening a soup? ›

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

What is the best food thickener for the elderly? ›

You don't need to use commercial thickeners for foods, since soup and other foods can be easily thickened with powdered potatoes (used for instant mashed potatoes), rice cereal, tapioca, or Jell-O, for example.

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 is the most common thickener for soups? ›

Add Flour Or Cornstarch

You can thicken soup by adding flour, cornstarch, or another starchy substitute. For the best results, never add flour or cornstarch directly to your soup. If you do, it will clump up on top. Instead, ladle a small amount of broth into a separate bowl and let it cool.

Why isn't my soup thickening with cornstarch? ›

Cornstarch is a common thickening agent in the culinary arts, but if you add it directly to the liquid you want to thicken, it will clump up. To thicken a sauce or soup with cornstarch, you first need to make a slurry, which is a mixture of equal parts cornstarch and liquid (usually water, stock or wine).

How long does it take for cornstarch to thicken soup? ›

While whisking or stirring constantly (again, lump prevention), pour your slurry into the pot of warm liquid. Continue to cook, stirring constantly, until the mixture has come to a boil and thickened, usually 1 to 2 minutes.

How do chefs thicken a sauce? ›

Whisking in pats of cold butter is one of the classic ways to thicken a pan sauce. This method works though emulsifying the liquid with the butter, increasing thickness slightly and adding heft and clinginess so your sauce coats food better.

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.

What thickens soups and stews? ›

The three main thickening agents for gravies are flour, cornflour and arrowroot. The first two are normally used in savoury dishes while arrowroot tends to be used in sweet dishes – that said, arrowroot will work in a savoury dish as it has no flavour.

How can I thicken soup without adding anything? ›

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.

What can I use to thicken soup instead of cornstarch? ›

Here are five of the best cornstarch substitutes for all your thickening needs.
  • All-Purpose Flour. Yep, that's right — all-purpose flour is a very stable thickener. ...
  • Arrowroot Powder. ...
  • Potato Starch. ...
  • Rice Flour. ...
  • Tapioca Starch.
Jun 23, 2023

What can I add to soup to make it thinner? ›

Chunkier soups, like black bean or lentil, tend to lean thick—and, it must be said, gloopy. To thin them out (and dial down the intense salinity), add more water or low-sodium stock while they're heating. (If you overdo it, don't stress: Continue simmering until the liquid has reduced to your desired consistency.)

How do you thicken soup without boiling it? ›

Corn-starch slurry is an easy way to thicken soups and sauces quickly. Mix equal parts corn starch and cold water (1 tablespoon is a good starting point) in a bowl until all the corn starch is dissolved and the resultant liquid is consistent. Then pour slowly in soup while storing continuously.

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