noun
cake flour; pastry flour
Low-protein wheat flour used for cakes, pastries, and delicate baked goods. Often contrasted with 強力粉 (bread flour) and 中力粉 (all-purpose flour).
ケーキを作るときは薄力粉を使います。
I use cake flour when making cakes.
薄力粉と強力粉の違いはタンパク質
The difference between cake flour and bread flour is the protein content.