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A slice of Sunday chocolate sheet cake on plate next to a glass of milk.

Sunday Chocolate Sheet Cake

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.9 from 7 reviews
  • Author: Shelly
  • Prep Time: 20 minutes
  • Cook Time: 20 minutes
  • Total Time: 40 minutes
  • Yield: serves 12 1x
  • Category: Cake
  • Method: Baking
  • Cuisine: Dessert


My family’s Sunday Chocolate Sheet Cake is the easiest, most comforting chocolate cake recipe ever. This simple chocolate cake is covered in chocolate icing fresh from the oven and the results are flaky, fudgy, and delicious!




  • 2 cups granulated sugar
  • 2 cups flour
  • 1/2 teaspoon salt
  • 1 teaspoon baking soda
  • 2 eggs
  • 1 1/2 cups whole milk
  • 1 tablespoon white vinegar
  • 2 teaspoons vanilla
  • 1/2 cup butter
  • 1/2 cup vegetable shortening (you can sub in butter if you prefer)
  • 1/4 cup cocoa powder


  • 1/2 cup butter
  • 1/4 cup cocoa powder
  • 1/4 cup milk + 2 Tbsp
  • 5 cups powdered sugar
  • 2 teaspoons vanilla



  1. Preheat oven to 400°F. Coat a 9×13 baking pan with nonstick spray and set aside.
  2. In a large bowl whisk together sugar, flour, salt, and baking soda. Set aside.
  3. In another bowl whisk eggs, milk, vinegar, and vanilla together. Set aside.
  4. In a saucepan melt butter, shortening, and cocoa powder together, whisking until completely melted and smooth.
  5. Remove from heat and pour into the flour mixture, and then add the other liquid ingredients. Stir together until smooth and there are no more lumps.
  6. Pour into prepared pan and bake for 15-20 minutes until the center of the cake is set.
  7. Prepare the icing when the cake is almost ready.


  1. Melt butter, cocoa powder, and milk together over medium heat. Bring just to a boil and remove from heat. Whisk in powdered sugar and vanilla until there are no lumps.
  2. Pour icing over the hot cake in the pan.
  3. Allow the cake to cool before slicing.


Store airtight at room temperature for up to 3 days


  • Serving Size: 1 slice
  • Calories: 773
  • Sugar: 118.6 g
  • Sodium: 236 mg
  • Fat: 25.2 g
  • Carbohydrates: 136.6 g
  • Protein: 5.3 g
  • Cholesterol: 94.9 mg
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