To transform all-purpose flour into a cake-flour substitute, you need exactly two things: a measuring cup and a spoonful of cornstarch. For every one cup of all-purpose flour, remove two tablespoons of flour, then add two tablespoons of cornstarch.
Whisk it like you mean it—air is your friend here. This simple swap dilutes the protein content ever so slightly, mimicking that soft, delicate structure of genuine cake flour. Think of it as giving your flour a spa day: lighter, finer, and ready to party.
Pro tip: Sift it three times. Not because you have to, but because the ritual aerates the mixture so your sponge cakes rise with an almost cloud-like loft. Marie Antoinette would approve—minus the whole “let them eat cake” drama.
When to Use the Swapped Flour
Use this DIY blend for anything that screams for tenderness: angel food cakes, chiffon rolls, or even tender biscuits. But don’t reach for it when you need structure—pizza dough, crusty bread, or chewy cookies will thank you for sticking with straight AP.
One more cultural nod: Southern bakers have been using this trick for decades, swapping cornstarch into their flour for the perfect buttermilk biscuit. It’s a region known for hospitality and a good biscuit crumb—trust them.
Cake Flour Substitute - by Budget101
