Dark Chocolate Sheet Cake with Dark Chocolate Frosting
A super rich, not-too-sweet, dark chocolaty sheet cake that's perfect for any party!
- Preparation:
- Cooking:
- Total:
- Serves: 1 person
Ingredients
- 1¾ cups all-purpose flour
- 1cup dark cocoa powder (such as Hershey's® Special Dark)
- 2teaspoons baking soda
- ½teaspoon salt
- 1cup firmly packed dark brown sugar
- ½cup white sugar
- ½cup unsalted butter, softened
- 2large eggs, at room temperature
- 2teaspoons vanilla extract
- 1cup strong brewed coffee, at room temperature
- 1cup buttermilk, at room temperature
- 1cup unsalted butter, softened
- ¾cup dark cocoa powder (such as Hershey's® Special Dark), sifted
- 1teaspoon instant espresso powder
- ⅛teaspoon salt
- 2teaspoons vanilla extract
- 3cups powdered sugar, or to taste
- 7tablespoons heavy whipping cream, or as needed
Instructions
Step 1
Preheat the oven to 350 degrees F (175 degrees C). Grease a 10x15-inch rimmed baking sheet and line the bottom of the pan with parchment paper.Step 2
Whisk flour, cocoa powder, baking soda, and salt together in a bowl until thoroughly combined. Set aside.Step 3
Beat brown sugar, white sugar, and butter together in a large bowl with an electric mixer until light and fluffy. Beat in eggs one at a time, mixing well after each addition. Mix in vanilla extract. Add in 1/3 of the flour mixture, and mix until just combined. Add in 1/2 of the coffee and buttermilk, and mix until just combined. Continue alternating additions of the flour mixture with coffee and buttermilk, mixing just until combined. Pour batter into the prepared pan; smooth into an even layer. Tap pan firmly on the counter several times to remove air bubbles.Step 4
Bake in the preheated oven until a toothpick inserted into the center of the cake comes out with a few moist crumbs, about 25 minutes. Do not overbake. Place cake on a wire rack and allow to cool completely.Step 5
Meanwhile, make the frosting. Beat butter in a large bowl until completely smooth. Mix in cocoa powder, espresso powder, and salt until thoroughly combined. Mix in vanilla. Add in powdered sugar 1 cup at a time, mixing well after each addition. Pour in heavy cream and beat until frosting is light and fluffy, 2 to 3 minutes. If frosting is too thick, add more heavy cream.Step 6
Spread frosting over the cooled cake.