Baking Powder (Best Option)
3/4 teaspoon per 1/4 teaspoon baking sodaBaking powder contains both an acid and a base, allowing it to react and produce carbon dioxide gas when moistened and heated, which helps the crepes rise gently. This is ideal for crepes, which require a light texture without excessive puffiness.
When substituting, use about three times the amount of baking powder as baking soda to achieve a similar leavening effect. Be mindful that too much baking powder can introduce a slight bitterness, so precise measurement is important.
Compared to baking soda, baking powder produces a more controlled and milder rise, resulting in crepes that are tender and pliable rather than overly airy or coarse.