Cake Flour - Glossary Term

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A type of flour produced from the endosperm portion of the wheat kernel. It is high in starch and has a low protein content, which means that it contains very little gluten, making it suitable for cake recipes.

If cake flour is not available, cornstarch makes a good substitute. All-purpose flour can also be used although the results will not be quite as light and airy. Subtract 2 tablespoons from each cup specified in the recipe when using all-purpose flour as a substitute for cake flour.