Resources > Food > Flours > Cornstarch

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Cornstarch is actually a corn flour. It is the quickest and easiest thickener for a home cook, since it thickens 50-100% more efficiently than all purpose flour.

Unlike all purpose flour, Cornstarch contains no protein. Cornstarch thickens because when added to food and heated (cooked), it causes the starch molecules to absorb liquid and swell, at room temperature, to about ten times their original size. Cornstarch is considered a "Moderate Impact Thickener" and gives a glossy, translucent appearance to sauces. Cornstarch is especially helpful in Asian Cuisine. 

Be careful using Cornstarch though. If introduced directly to hot liquids, the Cornstarch will create lumps that will not dissolve. The best way to use Cornstarch is to create a slurry with the Cornstarch (mixing it into a small amount of cold liquid), and add it to a simmering sauce at the last minute. Since Cornstarch thickens immediately, you will know where your sauce’s consistency stands instantaneously.

Smart Kitchen has an exercise on Using Cornstarch properly for Thickening Sauces.


Wheat Flour

Nutritional Value USDA
Amount Per 100g
Calories 381
%Daily Value*
Total Fat 0g
Saturated Fat 0g
Polyunsaturated Fat 0g
Monounsaturated Fat 0g
Cholesterol 0mg
Sodium 9mg
Potassium 3mg
Total Carbohydrate 91g
Dietary Fiber 0g
Sugars 0g
Protein 0g
* Percent Daily Values are based on a 2,000 calorie diet. Your Daily Values may be higher or lower depending on your calorie needs.
Gluten Free


Low Fat


Low Calorie