I prefer to make my own baking powder to ensure that it’s grain-free. Here’s the recipe: 1 part baking soda + 1 part cream of tartar + 2 parts arrowroot. I make the baking powder in large batches and store it in a glass jar. You can leave the chocolate out of the recipe and substitute pecans, walnuts, or even blueberries.
Adapted from Organic Spark.