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A slice of sour cream chocolate cake with a sweet chocolate frosting.

Old Fashioned Sour Cream Chocolate Cake

Looking for a deliciously moist chocolate cake recipe? Try my old fashioned sour cream chocolate cake! Sour cream keeps this chocolate cake perfectly moist, and the sweet homemade chocolate frosting is to die for!
Course Dessert
Cuisine American
Keyword cake, chocolate cake, chocolate frosting, dessert recipe, homemade, sour cream chocolate cake
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings 8 servings
Author I Heart Recipes


  • 1 cup unsalted butter softened
  • 3 cups packed granulated sugar
  • 4 large eggs
  • 1 tablespoon vanilla extract
  • 2 2/3 cups all-purpose flour
  • 3/4 cup unsweetened cocoa powder
  • 3 teaspoons baking soda
  • 1/2 teaspoon salt
  • 1 1/3 cups sour cream
  • 1 1/3 cup boiling water

Frosting Ingredients

  • 1/2 cup butter
  • 3 ounces unsweetened baking chocolate chopped
  • 3 ounces semi-sweet baking chocolate chopped
  • 5 cups powdered sugar
  • 1 cup sour cream
  • 1 teaspoon vanilla extract


  • Preheat the oven to 350 F.
  • Lightly grease, or oil a 9x12 baking dish, then set to the side
  • In a large mixing bowl, cream the butter, and sugar together until it’s light and fluffy.
  • Add each egg, one at a time, and beat well after each addition.
  • Stir in vanilla extract.
  • Sift the flour, cocoa powder, baking soda, and salt into another large mixing bowl. Whisk to combine.
  • Add the wet mixture and sour cream to the dry ingredients and beat with an electric mixer just until well blended.
  • Add the boiling water then stir until combined.
  • Pour the batter evenly into the prepared baking dish.
  • Bake on 350 F for 45 minutes, or until a toothpick is inserted into the center of the cake and comes out clean.
  • Set the cake aside to cool.
  • Melt the butter, then stir in the semi-sweet and unsweetened chocolate.
  • Microwave in 30 second intervals, stirring between each interval until the chocolate is melted.
  • In a large mixing bowl, combine the melted chocolate and butter mixture, powdered sugar, sour cream, and vanilla.
  • Beat with an electric mixer until smooth.
  • Spread the frosting evenly onto the cooled to room temperature cake.