For an even richer flavor, try using Dutch-processed cocoa powder. Room temperature ingredients are crucial for a smooth batter and even baking. Don't overmix the batter; this will result in a tough cake. If you don't have buttermilk, you can make a substitute by adding 1 tablespoon of white vinegar or lemon juice to a liquid measuring cup and filling it with milk to the 1-cup line. Let it stand for 5 minutes before using. The instant espresso powder enhances the chocolate flavor without making the cake taste like coffee. Don't skip it!
Dark Chocolate Sheet Cake with Dark Chocolate Frosting
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PREP TIME30 mins
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COOK TIME25 mins
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TOTAL TIME1 hrs 55 mins
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SERVING24 People
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VIEWS64
Indulge in the decadence of this deeply rich, yet balanced, dark chocolate sheet cake. Topped with a luscious dark chocolate frosting, it's the perfect centerpiece for celebrations or a comforting treat any day of the week.
Ingridients
Adjust Servings
Nutrition
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Carbohydrate39 g
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Cholesterol52 mg
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Fiber2 g
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Protein3 g
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Saturated Fat9 g
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Sodium190 mg
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Sugar29 g
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Fat15 g
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Unsaturated Fat0 g
DIRECTIONS
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01 Step
Recipe View Gather all ingredients.
02 Step
Recipe View 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. (5 minutes)
03 Step
Recipe View Whisk flour, cocoa powder, baking soda, and salt together in a bowl until thoroughly combined. Set aside. (3 minutes)
04 Step
Recipe View 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. (5 minutes)
05 Step
Recipe View Mix in vanilla extract. (1 minute)
06 Step
Recipe View Add in 1/3 of the flour mixture, and mix until just combined. (2 minutes)
07 Step
Recipe View Add in 1/2 of the coffee and buttermilk, and mix until just combined. (2 minutes)
08 Step
Recipe View Continue alternating additions of the flour mixture with coffee and buttermilk, mixing just until combined. (3 minutes)
09 Step
Recipe View Pour batter into the prepared pan; smooth into an even layer. Tap pan firmly on the counter several times to remove air bubbles. (2 minutes)
10 Step
Recipe View 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. (25 minutes)
11 Step
Recipe View Meanwhile, make the frosting. Beat butter in a large bowl until completely smooth. (3 minutes)
12 Step
Recipe View Mix in cocoa powder, espresso powder, and salt until throughly combined. Mix in vanilla. (2 minutes)
13 Step
Recipe View Add in powdered sugar 1 cup at a time, mixing well after each addition. (5 minutes)
14 Step
Recipe View 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. (3 minutes)
15 Step
Recipe View Spread frosting over the cooled cake. (5 minutes)
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RECIPE REVIEWS
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Please Rate
Berta Daugherty
Apr 22, 2025This cake was a huge hit at my office party! Everyone loved the intense chocolate flavor.
Cleora West
Feb 2, 2025The frosting is so smooth and creamy. I had to stop myself from eating it straight from the bowl!
Sheldon Hudson
Jan 5, 2025Easy to follow recipe and the cake turned out perfect!
Doris Corkery
Dec 18, 2024I was a bit skeptical about the coffee in the cake, but it really brings out the chocolate. I'll definitely be making this again!
Deshaun Koelpin
Nov 19, 2024My family devoured this cake in one day! It's now a family favorite.