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Ultimate Dark Chocolate Sheet Cake Recipe

Discover the perfect balance of elegance and simplicity with this indulgent dark chocolate sheet cake. This sophisticated dessert offers a grown-up chocolate experience with deep flavor intensity and moist texture, perfect for gatherings and special occasions.
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Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 12 servings
Calories: 420
Ingredients Method Notes

Ingredients
  

Ingredients
  • 2 cups all-purpose flour
  • 1½ cups granulated sugar
  • ¾ cup high-quality cocoa powder
  • 1 tsp baking soda
  • ½ tsp salt
  • 1 cup hot water
  • ⅔ cup vegetable oil
  • 2 large eggs
  • 1 tsp vanilla extract
  • ½ cup sour cream
  • 1 cup unsalted butter, softened
  • 3 cups powdered sugar
  • ½ cup cocoa powder
  • ⅓ cup milk or heavy cream
  • 1 tsp vanilla extract
  • Pinch of salt

Method
 

Instructions
  1. Preheat oven to 350°F (175°C) and prepare a 9x13 inch baking pan with parchment paper or light greasing
  2. In a large mixing bowl, whisk together flour, sugar, cocoa powder, baking soda, and salt until well combined
  3. In a separate bowl, mix hot water, vegetable oil, eggs, vanilla extract, and sour cream until smooth
  4. Gradually pour the wet ingredients into the dry ingredients, mixing until just combined
  5. Pour the batter into prepared pan and bake for 30-35 minutes, or until a toothpick inserted in center comes out clean
  6. Allow the cake to cool completely before frosting
  7. While cake cools, beat softened butter until creamy, then gradually add powdered sugar and cocoa powder
  8. Incorporate milk and vanilla into frosting mixture and beat until light and fluffy
  9. Spread the dark chocolate frosting evenly over the cooled cake

Notes

Use high-quality cocoa powder for maximum chocolate intensity. Don't overmix the batter to maintain tender texture. Ensure cake is completely cool before frosting to prevent melting. Cake improves in flavor when made a day ahead.