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Texas Chocolate or Vanilla Sheet Cake

Makes: 1 sheet pan
For Vanilla Sheet Cake: Just leave out all the cocoa & add 1 tsp vanilla to the frosting.
5 from 1 vote
Course: Dessert, Snack
Servings: 15
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Print Recipe

Ingredients  

Cake:

  • 1 cup water
  • 1 cup butter
  • 3 Tbsp unsweetened baking cocoa* (omit if making it a vanilla cake)
  • 2 cups all-purpose flour
  • 2 cups white sugar
  • 1 tsp baking soda
  • ½ tsp salt
  • ½ cup buttermilk (or sour cream)
  • 2 large eggs
  • 1 tsp vanilla

Frosting:

  • 6 Tbsp milk
  • 3 Tbsp unsweetened baking cocoa (omit if making it a vanilla cake)
  • ½ cup butter
  • 2 1/2-3 ½ cups powdered sugar
  • 1 cup pecans (chopped - optional)
  • 1 tsp vanilla* (add if making it a vanilla cake)

Instructions: 

  • Preheat the oven to 350° and grease a jelly-roll pan.
  • In a saucepan over medium heat, combine the water, butter, and cocoa powder and bring to a boil
  • Meanwhile, in a separate bowl, mix together the flour, sugar, baking soda, and salt.
  • In another small bowl, mix together the buttermilk, eggs, and vanilla.
  • Add the buttermilk/egg mixture to the flour mixture and stir until just combined.
  • Once the chocolate mixture in the saucepan comes to a boil, remove it from the heat and pour it into the batter. Mix until combined and no lumps remain.
  • Pour the mixture into the prepared pan and smooth with a spatula to make sure it is dispersed in an even layer.
  • Bake in a preheated oven for 15-25 minutes or until set (mine is usually done around 15 minutes).
  • When the cake is about half-way through cooking, prepare the frosting.

Frosting:

  • In a saucepan, combine the milk, cocoa, and butter and bring to a boil.
  • Once boiling, remove it from the heat and stir in the powdered sugar.
    *Make sure there are no lumps because they will remain when the frosting is poured on the cake. Beating with an electric mixer helps remove them.
    *The frosting should be a thinnish sauce but thicker than juice. It will harden as it cools on the cake.
  • Stir in the pecans.
  • When the cake is finished baking, remove from the oven and immediately pour the hot frosting over the hot cake. Use a spatula to spread it evenly over the cake.
  • Allow the cake to cool before serving.

Notes:

Make Ahead: This is best at room temperature, so it's a handy dessert to make ahead.