A Delectable Chocolate Sheet Cake Made With Mountain Valley

How to make a chocolate sheet cake even more delectable? Just add Mountain Valley. This moist, delicious take on the classic Chocolate Sheet Cake from our friend Ashley of Spoonful of Flavor comes together with simple ingredients and one you might not have thought of using before: Mountain Valley Sparkling Water

Using our sparkling water in the cake batter creates an even more light and flavorful chocolate cake. The batter comes together easily in one bowl with the delicious chocolate frosting in another bowl. This recipe will soon become your go-to chocolate cake. 

Bookmark this recipe to enjoy during the holidays, birthdays or any day that ends in "y" -- and you have our permission to lick the spoon. 

Chocolate Sheet Cake Recipe

Yields: 12 servings

Time: 45 minutes, plus cooling time


Chocolate Cake

  • 2 cups all-purpose flour
  • ¾ cup cocoa powder (baking cocoa)
  • 1 ½ teaspoon baking soda
  • 1 teaspoon baking powder
  • ½ teaspoon kosher salt
  • 1 ½ cups granulated sugar
  • ½ cup unsalted butter, melted (or vegetable oil)
  • 1 cup milk
  • 2 large eggs, lightly beaten
  • 1 cup Mountain Valley Sparkling Water

Chocolate Buttercream Frosting

  • 1 cup unsalted butter, room temperature
  • 2 cups powdered sugar, sifted
  • ½ cup cocoa powder, sifted
  • ½ teaspoon kosher salt
  • 1 ½ teaspoons vanilla extract
  • 1-2 tablespoons milk
  • Chocolate sprinkles, for garnish


  • Preheat the oven to 350 degrees. Line a 9x13 baking pan with parchment paper and set aside.
  • In a large bowl, whisk together flour, cocoa, baking soda, baking powder, salt and sugar.
  • Add the melted butter, milk, eggs and sparkling water. Mix until the wet ingredients are fully incorporated into the dry ingredients.
  • Transfer the batter to the pan and spread evenly. Bake for 28 to 32 minutes, until a toothpick inserted in the center comes out with little to no crumbs. Cool completely on a wire rack before frosting.
  • In the bowl of a stand mixer, beat the butter on medium speed until pale and fluffy, about 3 minutes. Add powdered sugar, cocoa and salt and mix on medium-low speed until well combined. Add vanilla and milk, mixing just until combined, scraping down the bowl as necessary.
  • Transfer the frosting to the cooled cake and spread in an even layer over the top. Garnish with chocolate sprinkles and serve.
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