For the Cake:
For the Frosting:
- 1 3/4 cups All-Purpose Flour
- 2 cups Granulated Sugar
- 3/4 cup Unsweetened Cocoa Powder, high quality
- 2 teaspoons Baking Soda
- 1 teaspoon Baking Powder
- 1 teaspoon Salt
- 2 Eggs, room temperature, lightly beaten
- 1 cup Buttermilk, room temperature
- 4 teaspoons Espresso Powder, dissolved in 1 cup hot water
- 1/2 cup Vegetable Oil
- 1 tablespoon Pure Vanilla Extract
- 1/3 cup Unsweetened Cocoa Powder, high quality
- 1 tablespoon Espresso Powder
- 1 1/2 cups Heavy Cream, chilled and divided
- 1 1/3 cups Granulated Sugar
- 16 ounces Mascarpone, chilled
- 1 cup Heath Toffee Bits, divided
- 2 Chocolate Covered Toffee Bars, cut into 4 pieces each
To Make the Cake:
Preheat oven to 350°F. Place a parchment circle into the bottom of two 9-inch cake pans. Spray lightly with nonstick baking spray containing flour. Set aside.
Over a large bowl, sift together flour, sugar, cocoa powder, baking soda, baking powder and salt.
Add the eggs, buttermilk, espresso mixture, oil, and vanilla. Beat well to combine using a whisk or a mixer on low speed until no lumps remain. Batter will be thin.
Divide evenly between cake pans. Bake in preheated oven for 35-40 minutes, rotating pans in oven half way through. Remove pans to wire racks to cool for 20 minutes then invert, remove from pans and cool completely.
To Make the Frosting:
In a large bowl, sift together cocoa powder and espresso powder. Set aside.
In a small sauce pan over medium heat, bring 1 cup heavy cream to a boil. Pour hot cream over cocoa mixture and whisk until dissolved. Add remaining 1/2 cup cold heavy cream and granulated sugar. Whisk until sugar has dissolved. Cover and chill until cold, about 2 hours.
Remove cream from fridge. Add mascarpone and using a stand or hand mixer, beat on low speed until smooth. Increase speed and beat until thickened and medium peaks form, about 2-3 minutes. Do not over beat or the mixture will curdle.
To Assemble the Cake:
Place one cake layer cake plate or cake board. Top with 1 cup frosting and spread evenly over cake layer. Sprinkle with 1/2 cup toffee bits. Place second cake layer on top. Frost top with 1 cup frosting then frost sides of cake, reserving a bit of frosting to make 8 decorative swirls on top, if desired.
Sprinkle top of cake with remaining 1/2 cup toffee bits.
Using a small star tip, make 8 decorative swirls at even intervals around edge of cake. Place 1 large toffee piece into center of each swirl. Chill cake at least 2 hours before serving. Set at room temperature for 30 minutes prior to serving.
I highly recommend Cacao Barry Cocoa Powder - Extra Dark for use in this cake.