Coffee-Chocolate Layer Cake with Mocha-Mascarpone Frosting

INGREDIENTS

Eggs, large

1 1/2 tsp

Baking soda

Bittersweet chocolate curls

2 cups

Cake flour

1 1/8 cups

Cocoa powder, natural unsweetened

2 cups

Golden brown sugar, packed

3/4 tsp

Salt

1 1/3 cups

Sugar

1 1/2 tsp

Vanilla extract

4 tsp

Espresso, instant

1 tbsp

Espresso, instant powder

3/4 cup

Butter, unsalted

1 cup

Buttermilk

1 1/2 cups

Heavy whipping cream

2 8 ounce containers

Mascarpone cheese