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A Classic Chocolate Sheet Cake

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  • Author: Lisa
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Total Time: 50 minutes
  • Yield: 12–16 servings
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

A classic chocolate sheet cake that’s rich, moist, and topped with a smooth layer of fudgy frosting. Perfect for birthdays, potlucks, or any gathering, this easy one-pan cake is always a crowd favorite.


Ingredients

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 3/4 cup unsweetened cocoa powder
  • 2 teaspoons baking soda
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 2 large eggs
  • 1 cup milk
  • 1/2 cup vegetable oil or melted butter
  • 2 teaspoons vanilla extract
  • 1 cup boiling water or hot coffee
  • For the frosting:
  • 1/2 cup butter
  • 1/4 cup unsweetened cocoa powder
  • 3 1/2 cups powdered sugar
  • 1/4 cup milk or cream (more as needed)
  • 1 teaspoon vanilla extract

Instructions

  1. Preheat oven to 350°F (175°C) and lightly grease a 9×13-inch baking pan.
  2. In a large bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt.
  3. Add eggs, milk, oil, and vanilla. Mix until smooth and well combined.
  4. Stir in boiling water or hot coffee; the batter will be thin.
  5. Pour into the prepared pan and bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
  6. While the cake cools, prepare the frosting: melt butter, whisk in cocoa powder, then gradually add powdered sugar, milk, and vanilla until smooth and spreadable.
  7. Spread frosting evenly over the cooled cake.
  8. Slice and serve.

Notes

  • For a richer flavor, use brewed coffee instead of water.Add chopped nuts, chocolate chips, or a peanut butter drizzle for variation.Store covered at room temperature for 3 days or refrigerate up to 5 days.Freeze unfrosted cake for up to 2 months; thaw and frost before serving.For a gluten-free version, use a gluten-free flour blend.

Nutrition

  • Serving Size: 1 slice (1/16 of cake)
  • Calories: 380
  • Sugar: 40g
  • Sodium: 300mg
  • Fat: 17g
  • Saturated Fat: 7g
  • Unsaturated Fat: 9g
  • Trans Fat: 0g
  • Carbohydrates: 55g
  • Fiber: 3g
  • Protein: 4g
  • Cholesterol: 40mg