Ingredients
Scale
- 1 cup plus 1 tbsp (150g) all-purpose flour
- ⅓ cup (28g) cocoa powder
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ¾ cup (150g) granulated sugar
- ¼ teaspoon salt
- 1 large egg
- ¼ cup (60ml) oil
- ⅓ cup (80ml) whole milk
- 1 teaspoon (5ml) pure vanilla extract
- ½ cup (120ml) hot coffee
- 5 oz (142g) marshmallows
- 3 tablespoon (42g) unsalted butter
- 1 cup (273ml) 35% heavy whipping cream
- 5 oz (142g) semisweet dark chocolate
- ⅓ cup plus 1 tbsp (95ml) 35% heavy whipping cream, cold from the fridge
- 1 teaspoon (7ml) honey or corn syrup
Instructions
- Preheat the oven to 325°F. Line an 8×8-inch square baking pan with parchment paper, leaving a 2-inch overhang.
- Sift flour, cocoa powder, baking powder, and baking soda into a bowl. Add sugar and salt, and whisk to combine.
- Create a well in the dry ingredients. Add oil, egg, milk, and vanilla extract, and whisk together until combined. The batter will be thin.
- Spread the batter in the prepared pan and bake for 20-25 minutes or until a skewer comes out clean. Let cool completely in the pan.
- For the filling, melt butter with marshmallows in a microwave for 2-3 minutes, stirring until smooth. Let cool slightly.
- Whip the cold cream until it holds stiff peaks. Mix in half into the marshmallow mixture, then fold in the rest gently.
- Slice the cooled cake in half and spread marshmallow filling over the bottom layer. Add the top layer and chill.
- For ganache, heat cream with honey until boiling, then pour over chopped chocolate. Whisk until smooth.
- Pour ganache over the chilled cake and let it set. Pipe the reserved filling on top in loops. Slice and serve!
Notes
The cake layers can be made a day in advance and assembled just before serving.
Experiment with different types of chocolate for the ganache topping.
Ensure the marshmallow filling cools to room temperature before mixing in whipped cream for the best texture.
Nutrition
- Serving Size: 1 slice
- Calories: 320
- Sugar: 20g
- Sodium: 200mg
- Fat: 20g
- Saturated Fat: 10g
- Unsaturated Fat: 9g
- Trans Fat: 0g
- Carbohydrates: 36g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 50mg
Nutritional information is an estimate. The nutritional values for your final dish may vary based on measuring differences and products used.