INGREDIENTS
DIRECTIONS
Whisk all dry ingredients together and store in a glass jar or other airtight container. To use, measure 3 ounces or about 6 tablespoons and add to the boxed mix.
Makes enough to extend 6 (15.25-ounce) boxes.
NOTE
For a chocolate cake, reduce the flour to 1 cup PLUS 3 tablespoons and add 5 tablespoons unsweetened cocoa powder.