How to Thicken Soup That Is Too Thin

You can thicken watery soup by adding a starch-based thickener, simmering it uncovered to evaporate excess liquid, or pureeing some of the soup and stirring it back in. Using one or more of these 3 methods can bring the soup to the desired consistency while preserving its flavor. Soup is often too thin because too much water was added or it was not cooked long enough. Excess liquid can dilute the flavor, so thickening can improve both texture and taste. When starch or flour is mixed with water and heated, it thickens the soup.

How Can You Thicken Thin Soup?
Try one of these methods:
• Mix a small amount of cornstarch with cold water until smooth, then slowly stir it into the simmering soup.
• Simmer the soup uncovered over medium heat for a few minutes to evaporate excess liquid.
• Remove a ladleful of soup, puree its vegetables or legumes, and stir it back in.
• Mix a small amount of flour with cold water until smooth, then stir it into the soup.
After adding starch or flour, simmer the soup for a few minutes so the raw taste cooks off.

What Mistakes Should You Avoid When Thickening Soup?
Adding starch or flour directly to hot soup without first mixing it with cold water can cause lumps. Adding too much thickener too quickly can make the soup overly thick. When simmering soup uncovered, check the bottom of the pot to make sure it is not sticking or scorching. Let the thickener cook for a few minutes before serving so its raw taste can cook off.

Which Thickening Method Works Best for Different Soups?
For vegetable soup, puree some of the soup and stir it back in. This method requires no extra ingredients and preserves the soup's flavor. Starch-based thickeners work quickly and consistently in meat or chicken soups. For lentil or chickpea soup, simmering longer may be enough to thicken it. Timing matters: thicken the soup a few minutes before serving so the texture can settle and the flavor can balance. If the soup will sit before serving, leave it slightly thin and make a final adjustment later; it may thicken as it rests. Add thickener gradually and check the texture as you go. Since soup can thicken further while resting, it is safer to leave it slightly thin at first than to add too much.

Watery soup can be thickened with starch or flour, uncovered simmering, or by pureeing some of its vegetables. Start with a small amount and check the texture before adding more.