β Sponge Cake Flour Blend (All-Purpose Flour + Potato Starch) (Best Gluten-Free Option)
For every 1 cup cake flour, use 1 cup all-purpose flour minus 2 tablespoons, plus 2 tablespoons potato starchPotato starch, like cornstarch, dilutes the protein content of all-purpose flour, reducing gluten formation. It also retains moisture well, which helps keep cupcakes tender and moist.
Mix thoroughly and sift to ensure even distribution. Be cautious with liquid ratios as potato starch can retain more moisture.
Cupcakes will be soft and moist but may have a slightly different mouthfeel compared to cornstarch blends, sometimes with a bit more chew.