Chocolate Sheet Cake with Chocolate Frosting

Homemade Chocolate Sheet Cake & Chocolate Frosting

A deliciously rich homemade chocolate sheet cake with a pour-on chocolate frosting. This is a classic chocolate sheet cake recipe.
Course Dessert
Cuisine American
Keyword chocolate sheet cake, homemade chocolate cake recipe, pour on chocolate frosting, skip cake
Prep Time 30 minutes
Cook Time 22 minutes
Total Time 52 minutes
Servings 1 9x13 cake
Author Susie


Chocolate Sheet Cake

  • 2 cups All Purpose Flour
  • 2 cups Sugar
  • 1 teaspoon Salt
  • 2 cups Butter
  • 1 cup Water
  • 3 Tablespoons Cocoa
  • 2 Eggs
  • 1/2 cup Sour Milk 1/2 cup milk mixed with 2 Tablespoons white vinegar
  • 1 teaspoon Baking Soda
  • 1 teaspoon vanilla

Chocolate Frosting

  • 1 cup Butter
  • 3 Tablespoons Cocoa
  • 5 Tablespoons Milk
  • 1 teaspoon Vanilla
  • 3 1/2 cups Powdered Sugar


  • Preheat the oven to 350. Prepare a large sheet pan (18x12x1) by greasing and flouring.
  • In a large bowl combine flour, sugar and salt.
  • In a saucepan over medium high heat bring to a boil 2 cups butter, 1 cup water, and 3 Tablespoons cocoa. Remove from heat and stir into the flour/sugar mixture. Next add 2 slightly beaten eggs (you may want to temper your eggs slightly with a tablespoon of the warm batter ), sour milk, baking soda, and vanilla. Stir to combine. Pour into prepared sheet pan. Bake for 18-22 minutes.
  • While the cake is baking prepare your frosting so it can be poured on as soon as the cake comes out of the oven.
  • In a saucepan over low heat mix together all 5 of the chocolate frosting ingredients. Stir often until it is melted and well combined.
  • As soon as the cake comes out of the oven pour the frosting over the cake. Smooth with a offset spatula or knife. Let rest 15-20 minutes for the frosting to set before serving.