Description
A decadent chocolate marshmallow layer cake with marshmallow frosting and chocolate drip, perfect for birthdays or special occasions.
Ingredients
Scale
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 3/4 cup unsweetened cocoa powder
- 2 tsp baking powder
- 1 1/2 tsp baking soda
- 1 tsp salt
- 1 cup buttermilk
- 1/2 cup vegetable oil
- 2 large eggs
- 2 tsp vanilla extract
- 1 cup hot coffee (or hot water)
- 1 cup (2 sticks) unsalted butter, softened
- 2 1/2 cups powdered sugar
- 1 tsp vanilla extract
- 1/4 tsp salt
- 1/3 cup heavy cream (plus more if needed)
- 1 1/2 cups marshmallow crème (fluff)
- 1 cup semisweet chocolate chips
- 1/2 cup heavy cream
- Pinch of salt (optional)
Instructions
- Preheat oven to 350°F. Grease and line three 8-inch round pans with parchment.
- In a large bowl, whisk flour, sugar, cocoa, baking powder, baking soda, and salt.
- Add buttermilk, oil, eggs, and vanilla; mix until smooth.
- Slowly pour in hot coffee and whisk until combined (batter will be thin).
- Divide evenly between pans and bake 22–28 minutes, until a toothpick comes out with a few moist crumbs.
- Cool 10 minutes, then turn out and cool completely.
- Beat butter for 2 minutes until fluffy. Add powdered sugar, vanilla, and salt; beat until smooth.
- Mix in heavy cream. Fold in marshmallow crème until light and spreadable. Add a splash more cream if needed.
- Place first cake layer on a plate. Spread a thick layer of marshmallow cream. Repeat with the second layer. Add the top layer.
- Apply a thin crumb coat around the cake, chill 15 minutes, then frost the outside.
- Pipe or spoon small dollops of marshmallow cream around the sides in rows (or evenly spaced all over the sides).
- Heat heavy cream until steaming (microwave 30–45 seconds). Pour over chocolate chips, sit 2 minutes, then stir until glossy.
- Let cool 5–10 minutes so it’s thick but pourable. Drizzle over the top and down the sides.
- Add extra marshmallow dollops on top if you want. Slice and enjoy!
Notes
- Use hot coffee for deeper chocolate flavor, but hot water works too.
- Chill the cake before adding the chocolate drip for cleaner lines.
- Store leftovers in an airtight container at room temperature for up to 3 days.
- Prep Time: 35 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 650
- Sugar: 65g
- Sodium: 450mg
- Fat: 35g
- Saturated Fat: 18g
- Unsaturated Fat: 14g
- Trans Fat: 0g
- Carbohydrates: 85g
- Fiber: 4g
- Protein: 8g
- Cholesterol: 85mg
Keywords: chocolate marshmallow layer cake, s’mores layer cake, marshmallow frosting cake, chocolate cake with marshmallow filling, birthday chocolate cake, decadent chocolate dessert