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5 from 1 vote

Vegan Texas Sheet Cake

A plant based version of the classic, this vegan Texas Sheet Cake is sure to be a hit at any party!  
Prep Time20 mins
Cook Time20 mins
Total Time40 mins
Course: Dessert
Cuisine: American
Keyword: sheet cake, texas sheet cake, vegan
Servings: 24 people

Ingredients

For the cake:

  • 2 cups all purpose flour
  • 2 cups sugar
  • 1 cup water
  • 1/2 cup vegetable oil
  • 1/2 cup dairy free butter (I like Earth Balance)
  • 4 Tablespoons cocoa powder
  • 1/2 cup non dairy milk (I used oat milk)
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • 1 teaspoon vanilla
  • 2 Tablespoons apple cider vinegar

For the frosting:

  • 1/3 cup non dairy milk (I used oat milk)
  • 1/2 cup dairy free butter (I like Earth Balance)
  • 4 Tablespoons cocoa powder
  • 1 teaspoon vanilla
  • 1 pound powdered sugar

Instructions

For the cake:

  • Preheat the oven to 400°.  Line a 12"x17" sheet pan with parchment paper, and spray with cooking oil spray (it is necessary to spray or grease to ensure easy removal from pan).  Set aside. 
  • Mix the flour and sugar together in a large bowl.  Set aside.
  • Add the water, oil, butter, and cocoa powder together in a small bowl.  Melt in the microwave for 2 minutes.  Whisk together to make sure butter is melted.
  • Pour the melted chocolate butter mixture over the flour and sugar.  Whisk together until flour is completely incorporated.  Set aside.
  • Add the milk, baking powder, baking soda, and vanilla to a 2 cup measuring cup.  Whisk together.  
  • Add the apple cider vinegar.  You can give it a small stir and watch it bubble—it will rise to the 2 cup line!
  • Pour the vinegar mixture over the batter and whisk gently until completely incorporated.  
  • Pour the batter onto your prepared sheet pan.  Place in the oven and bake for 20 minutes.  
  • Remove the cake from the oven and allow to cool completely (because it is a thin cake it does cool quickly!).

For the frosting:

  • Once the cake is cool, begin the frosting.  Do not make the frosting ahead, as it will firm up too much and you won't be able to spread.
  • Place the milk, butter, cocoa powder, and vanilla in a small bowl.  Melt in the microwave for 2 minutes. Whisk together to make sure butter is melted.
  • Place 1 pound of powdered sugar in a large mixing bowl.  
  • Pour the melted butter chocolate mixture over the powdered sugar and whisk completely (alternatively you can do this in your mixture to avoid any lumps of powdered sugar).
  • Working quickly, pour the frosting over the cooled cake and spread with a spatula to cover evenly.  Allow to cool completely before cutting.  
  • Cut into squares and serve.  If it is especially warm in your house you can store the cake in the refrigerator.  Enjoy!

Notes

1/2 cup of butter = 8 Tablespoons = 1 stick of Earth Balance