What is the difference between cake flour and pastry flour?

Answer 1

Cake flour has the least amount of gluten of all wheat flours, making it best for light, delicate products such as sponge cakes, genoise, and some cookie batters. Made from extra short or fancy patent flour, milled from soft wheat, cake flour often comes bleached, which gives it a bright, white appearance. In this book, flours are assumed to be unbleached unless otherwise indicated.

Pastry flour also has a low gluten content, though it contains a bit more than cake flour. Made from fancy clear flour, a soft wheat flour, it is used for making tart and pie doughs, some cookie batters, and muffins.

Answer 2

cake flour uses a different wheat that produces LESS gluten