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Cake Flour

Low-protein, chlorinated flour for tender, fine-crumbed cakes — lighter per cup than AP.

1 cup

114–120 g

1 tbsp

7.5 g

Protein

7–9%

DIY swap

2 tbsp cornstarch + AP to 1 cup, sifted ×2

Where it matters

sponge and chiffon cakes

Skip it in

cookies and bread

About Cake Flour

Cake flour's chlorination weakens gluten and helps fats emulsify — the fine crumb of chiffon and sponge cakes. The DIY swap (2 tbsp cornstarch per cup of AP, sifted twice) approximates it well. Weight matters more here than anywhere: its lightness means a scooped cup of cake flour is a 25% error.