Baking powder usually contains cream of tartar, so this is the best swap. To make it, mix together 1/4 teaspoon of baking soda and 1/2 teaspoon of cream of tartar. Since cream of tartar is ...

Drain any excess liquid. Baking soda: 1 teaspoon Baking powder: 1 teaspoon Butter: 1-pound (roughly 450gm) Eggs: 1 dozen Dark brown sugar: 1-pound (roughly 450gm) All-purpose flour: 4 cups ...