Best Substitutes for Cake Flour
Cake flour is lower in protein than all-purpose — you can approximate it by cutting AP flour with cornstarch.
Best overall swap
All-purpose flour + cornstarch
For 1 cup cake flour: 1 cup AP flour minus 2 tbsp, plus 2 tbsp cornstarchSift together at least twice for an even, tender crumb close to true cake flour.
All Substitutes for Cake Flour
All-purpose flour + cornstarch
For 1 cup cake flour: 1 cup AP flour minus 2 tbsp, plus 2 tbsp cornstarchSift together at least twice for an even, tender crumb close to true cake flour.
All-purpose flour
1:1Works in a pinch but the cake will be slightly denser and less delicate.