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 to make your 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 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.

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 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.)

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 do Chinese use to thicken soup? ›

The main uses for cornstarch in Chinese cooking are: Marinating meats to create a velvety texture after stir-frying. Dredging foods prior to deep-frying to achieve a perfectly crispy result. Magically thickening soups, gravies, and stir-fry sauces.

What is a healthy alternative to thicken soup? ›

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.

What 2 ingredients are used to thicken the soup? ›

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.

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

5 Best Cornstarch Substitutes
  • All-Purpose Flour. Yep, that's right — all-purpose flour is a very stable thickener. ...
  • Arrowroot Powder. If you happen to have this starch on hand, you're in luck: It has the same thickening power as cornstarch, and it creates a beautiful, shiny sauce. ...
  • Potato Starch. ...
  • Rice Flour. ...
  • Tapioca Starch.
Jun 23, 2023

Why is my cornstarch not thickening? ›

Turn up the setting to a medium heat setting because the cornstarch mixture will thicken the best when it is lightly boiling. Using too much heat, however, can thin out and break down the sauce. If you are only cooking the cornstarch mixture, you should pour it in a pan and turn it to medium heat.

What naturally thickens soup? ›

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 is the best thickening agent for 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. Cornstarch is flavorless, easy to mix up, and versatile, which makes it a go-to pantry ingredient.

What is the healthiest thickening agent? ›

Easy-to-access alternatives are wheat flour, arrowroot flour, and rice flour. These are good alternatives to cornstarch because they are more nutritious and contain fewer carbohydrates and calories. Xanthan and guar gum are much stronger thickeners than cornstarch, but they can be harder to obtain and use.

What causes soup to thicken? ›

Adding starchy foods like rice, potatoes, pasta, and beans can also help thicken up a soup while adding texture and body. As they cook, they release starches, creating a thicker consistency. Beans and potatoes are an especially great choice for making creamy, dairy-free vegetarian or vegan soups.

How do you make soup more watery? ›

Ok, this may be a little obvious, but just adding water is going to make your soup go a little further. If you stick to a 50/50 ratio between water and whatever flavoured liquid you're using in your soup (be it tomatoes, a stock type, or a cream), you're unlikely to dilute it to the point of making it unpalatable.

How to thicken broth without cornstarch? ›

A handful of uncooked rice. That's all folks, just a handful of white rice. Any kind will do: jasmine, basmati, short grain, long grain. When added to a brothy (or watery, even) soup, and left to simmer for 20-30 minutes, the rice breaks down, releasing its starch and thickening the liquid that it's cooking in.

Does milk help thicken soup? ›

Both whole milk and fat free will work, though you'll get a richer soup with whole milk. Spoon it into the soup near the end, and let it simmer for a few minutes to thicken. Yogurt will change the flavor of your soup more dramatically than cream, as it is much tangier.

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