Cake Mix Extender

Use this to upsize any older recipe that calls for an 18.25 ounce box cake mix.


  • 1 1/2 cups all-purpose flour
  • 1 cup sugar
  • 2 teaspoons baking powder
  • 1/4 teaspoon baking soda


  1. Whisk all dry ingredients together and store in a clean glass jar.
  2. To increase a 15.25 ounce cake mix to 18.25 ounces, add 6 level tablespoons to your 15.25 ounce cake mix.

This page may contain affiliate links. Any purchases made through these links help support at no additional cost to you. Please see our Disclosure Policy.

Weekly Specials from The Prepared Pantry