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Half Boxed Birthday Cake

Half Boxed Birthday Cake

  • Author: Sophia Inza


If you always have way too much birthday cake leftover- make this small batch recipe! It’s just half of a boxed cake so perfect for two!


  • Half of one box yellow cake mix (check post for tips on how to measure this)
  • 1 egg
  • 1/4 butter, melted
  • 2/3 cup milk
  • 1/4 cup sprinkles + extra for topping
  • 1 tub frosting


  1. Preheat oven to 350F
  2. Spray a 6 inch cake pan with non stick cooking spray and line the bottom with a greased piece of parchment paper. Set aside.
  3. In a medium bowl, combine the yellow cake mix, egg, butter and milk. Mix for 2 minutes until very well combined.
  4. Add in the sprinkles and mix gently until spread throughout. 
  5. Pour batter into prepared baking pan. Bake for 35-45 minutes or until toothpick inserted in the center comes out clean.
  6. Remove from oven, let it sit in the pan for 10-15 minutes then invert onto a wire rack to fully cool.
  7. If you want a one later cake, simply frost, decorate and enjoy!
  8. If you want a two later cake, slice the cake in half using a Serrated knife. Add an even layer of frosting to one half and top with the other piece of cake. Now frost the whole cake and add sprinkles.