Does Cake Flour Typically Contain Baking Powder? - Tasting Table
Briefly

Baking can be daunting, especially regarding flour choices. Cake flour is designed for fluffy treats such as angel food cake and provides a lighter crumb due to its lower protein content of 5%-8%. It's essential to note that cake flour doesn’t contain leavening agents; thus, baking powder or soda must be added. In contrast, self-raising flour already includes these agents, making it suitable for heavier baked goods. One can create self-raising cake flour by mixing all-purpose flour with baking powder, but care must be taken not to over-add leavening to ensure optimal results.
Cake flour, created for ultra light baked goods, contains no leavening agents; baking powder or baking soda must be added separately for proper rise.
Self-raising flour combines all-purpose flour with baking powder and salt, providing convenience for heavier baked goods like scones, especially popular in the U.K.
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