Prep Time::10 mins
Cook Time::20 mins
Total Time::30 mins
Servings::32
Yield::1 10×15-inch cake
Ingredients
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Cake:
2 cups all-purpose flour
2 cups white sugar
1 teaspoon baking soda
½ teaspoon salt
½ cup sour cream
2 eggs
1 cup butter
1 cup water
5 tablespoons unsweetened cocoa powder
Icing:
6 tablespoons milk
5 tablespoons unsweetened cocoa powder
½ cup butter
4 cups confectioners' sugar
1 teaspoon vanilla extract
1 cup chopped walnuts (Optional)
Directions
Gather all ingredients.
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Preheat the oven to 350 degrees F (175 degrees C). Grease and flour a 10×15-inch jelly roll pan.
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Make cake: Combine flour, sugar, baking soda, and salt in a mixing bowl. Beat in sour cream and eggs.
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Melt butter in a saucepan over low heat. Stir in water and cocoa powder. Bring mixture to a boil then remove from the heat.
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Allow to cool slightly, then stir cocoa mixture into the flour and egg mixture until blended. Pour batter into the prepared pan.
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Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 20 minutes. While the cake is baking, make icing: Combine milk, cocoa powder, and butter in a large saucepan over medium heat.
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Bring to a boil, then remove from heat. Stir in confectioners' sugar and vanilla, then fold in walnuts, mixing until blended.
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Spread icing over warm cake.
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Serve and enjoy!
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