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Peanut Butter Chocolate Chip Sheet Cake

Simply Kierste
Prep Time 20 mins
Cook Time 20 mins
Total Time 40 mins
Course Dessert


  • 1/2 c. peanut butter
  • 1 c. water
  • 1 c. butter
  • 2 c. flour
  • 2 c. sugar
  • 1 tsp. salt
  • 1 tsp. baking soda
  • 2 eggs
  • 1/2 c. buttermilk
  • 1 package chocolate chips

Peanut Butter Frosting

  • 3/4 c. butter
  • 1/2 c. peanut butter
  • 6 T. milk
  • 1 tsp. vanilla
  • 4 c. powdered sugar


  • Combine the flour, sugar, salt, and baking soda in a large mixing bowl, and set aside. In a large saucepan, bring the peanut butter, water, and butter to a rapid boil. Pour it over the flour mixture, and mix well. Add the eggs and buttermilk. (If you don't have buttermilk, you can substitute sour milk: add 1 T. vinegar to the 1/2 c. milk) Pour into a greased sheet cake pan. Sprinkle the chocolate chips over the batter evenly. Bake at 350 degrees for 20-25 minutes, or until a toothpick comes out clean.
  • To make the frosting, bring the butter, peanut butter, and milk to a boil. Add the vanilla and powdered sugar, and mix well. I like to use a whisk to make sure all the little lumps of sugar get mixed in!
  • Cool the cake slightly, then frost while cake is warm.