Dark Cocoa Buttermilk Cake with Cocoa Mascarpone Frosting

INGREDIENTS

3/4 cup

butter

eggs

2 1/3 cups

all-purpose flour

3/4 cup

Dutch-processed unsweetened cocoa powder or unsweetened cocoa powder

1 tsp

baking soda

3/4 tsp

baking powder

1/2 tsp

salt

1 cup

granulated sugar

1 cup

packed brown sugar

2 tsp

vanilla

1 1/2 cups

buttermilk or sour milk*

Cocoa Mascarpone Frosting (recipe below)

White and dark chocolate shavings (optional)

1/2

of an 8-ounce tub mascarpone cheese or one-half of an 8-ounce package cream cheese, softened

1/2 cup

butter, softened

1/3 cup

Dutch-processed unsweetened cocoa powder or unsweetened cocoa powder

2 tbsp

milk

2 tsp

vanilla

16 - ounce box powdered sugar, sifted (4-1/4 to 4-1/2 cups)