What Can You Use Instead of Cornstarch?

In most recipes, flour, potato starch, or semolina can replace cornstarch as a thickener. For a sauce or custard, you can use about two 15 ml measures of flour instead of one 15 ml measure of cornstarch. The ratio may vary depending on the recipe and the desired consistency, so watch the mixture as it heats. Starch thickens a mixture by absorbing water when heated in liquid. Different starches and flour serve similar purposes, but their thickening power varies. Flour is less powerful than cornstarch, so it is generally used in twice the amount. Potato starch has a thickening power close to cornstarch, so it can be used at nearly a one-to-one ratio in most recipes.

Which thickeners can replace cornstarch?

If you are out of cornstarch, several common kitchen ingredients can work as alternatives. Choose one based on the type of recipe. Flour works well in opaque mixtures such as sauces, soups, and custards, while potato or rice starch is more suitable for clear recipes such as fruit sauces and jellies. For any alternative, mix the thickener with a little cold liquid first, then add it to the hot mixture to help prevent lumps.

You can use about two 15 ml measures of flour instead of one 15 ml measure of cornstarch. Potato starch can be used in a ratio close to one-to-one with cornstarch. A small amount of semolina can thicken milk-based desserts. Rice flour can also replace cornstarch in clear sauces.

What mistakes can happen when changing thickeners?

The most common problems are a lumpy texture or a mixture that is thinner than expected. These issues can be prevented with the right technique. Adding flour directly to hot liquid causes lumps, so mix it with a little cold liquid first. When using flour, cook the mixture for a few more minutes so it loses its raw-flour taste. Using the same amount of flour as cornstarch may leave the sauce insufficiently thick. Boiling the mixture without stirring constantly can create a grainy texture on the bottom.

Which alternative works best in each recipe?

Consider how clear the recipe needs to be. Potato or rice starch gives better results in recipes where a clear appearance is desired, such as fruit sauce or jelly. Flour works well in opaque mixtures such as custard, milk-based desserts, and soup. In all cases, mixing the thickener with cold liquid first is the most reliable way to achieve a smooth consistency. Cook the mixture over medium heat, stirring constantly, until it thickens; remove it from the heat when it reaches the desired consistency. Remember that it will thicken a little more as it cools, so stop cooking when it lightly coats the back of a spoon.

In most recipes, flour, potato starch, or rice flour can replace cornstarch. Using the right ratio and adding the thickener without forming lumps can produce a similar consistency. Whether the recipe should be clear or opaque determines the best alternative. Whatever thickener you choose, stirring constantly and watching the consistency as it cooks are the most important steps for a smooth result and help prevent both lumps and excessive thickening.