Cooking Techniques

How to Thicken Soup or Sauce: 7 Proven Methods

Quick take: From roux to purees, thickening soups and sauces depends on your desired texture, flavor impact, and dietary needs.

Roux adds richness and body. Whisk 2-3 tablespoons into your soup for creamy results.

Cornstarch slurry (1 tablespoon cornstarch + 1 tablespoon cold water per cup of liquid) is quick and neutral-tasting. Add at the end and simmer 2-3 minutes.

Pureed vegetables create silky texture while adding nutrition. Blend a portion of the finished soup—potatoes, carrots, or cauliflower work beautifully.

Reduction intensifies flavor while thickening naturally. Simmer uncovered until desired consistency.

Arrowroot powder handles frozen and thawed foods better than cornstarch.

Protein-based thickening (egg yolks, heavy cream) creates luxurious, silky textures.

Beans and legumes blend seamlessly for protein and fiber.

Frequently Asked Questions

What's the fastest way to thicken soup?

A cornstarch slurry (1 tablespoon cornstarch mixed with 1 tablespoon cold water per cup of liquid) is the fastest method. Add it at the end and simmer 2-3 minutes.

How do you thicken soup without flour?

Use cornstarch slurry, pureed vegetables, reduction (simmering uncovered), arrowroot powder, egg yolks, or blended beans and legumes.

Can you use potato to thicken soup?

Yes. Pureed potatoes create a silky, creamy texture while adding nutrition. Blend a portion of the soup with cooked potato and stir back in.

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Written by the SummitPlate Team

Our team combines nutritional science and AI technology to help families eat better and save money. SummitPlate's meal plans are designed using USDA nutritional guidelines and optimized to reduce food waste through smart ingredient overlap.

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