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9 Ingredient Moist Yellow Cake with Chocolate Buttercream Frosting

Brooke Eliason
Servings: 1 cake
Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes

Ingredients 

Cake

  • 1 cup sour cream
  • ⅓ cup melted butter
  • ½ cup hot water
  • ¼ cup sugar
  • 4 large eggs
  • 1 tablespoon vanilla extract
  • 1 package yellow cake mix

Frosting

  • 1 cup unsalted butter at room temperature
  • 2½ cups powdered sugar
  • 1 tablespoon vanilla extract
  • 4-8 ounces semisweet chocolate, melted and cooled

Instructions

  • Preheat oven to 350 degrees. Spray two 8-inch cake pans with cooking spray, line with circular cuts of parchment paper, and spray again. Set aside.
  • Mix all cake ingredients together in electric mixer for 1-2 minutes, until smooth. Distribute the cake batter evenly between the two cake pans. Bake for 30-35 minutes, or until a toothpick comes out clean. Do not over bake.
  • While cake is baking, prepare the frosting. Use an electric mixer to whip the butter with powdered sugar and vanilla. Add melted chocolate and use spatula to scrape the sides of mixing bowl to ensure all frosting ingredients are incorporated. Set aside until cake is ready and whip with spatula or whisk just before frosting.
  • Remove parchment paper and allow cakes to cool on wire rack. Frost as desired and serve with vanilla ice cream.