Sour Cream Fudge Cake

INGREDIENTS

1 cup

unsweetened cocoa powder (I used special dark dutch process cocoa)

1 cup

HOT brewed coffee

1/2 cup

sour cream

1 tsp

vanilla

1 cup

unsalted butter, softened (plus additional for the pans)

1 cup

granulated sugar

1/2 cup

light brown sugar, packed

large eggs

1 1/2 cups

all purpose flour (plus the flour for the pans

1 tsp

baking soda

1/2 tsp

salt

For the Chocolate Buttercream:

1 cup

unsalted butter

4 cups

powdered sugar

1/2 cup

unsweetened cocoa powder

1/2 cup

milk or cream

1 tsp

vanilla

1/2 tsp

kosher salt