Kue Coklat Ganda dengan Frosting Buttercream

Bahan-bahan (12 porsi)

• 2 cups sugar
• 1 3/4 cups flour
• 3/4 cup cocoa
• 1 1/2 tsp baking powder
• 1 1/2 tsp baking soda
• 1 teaspoon salt
• 2 eggs
• 1 cup buttermilk
• 1/2 cup butter, melted
• 1 tbsp vanilla extract
• 1 cup hot coffee (or 1 cup boiling water)
• 2 sticks (1 cup) butter, room temperature
• 1 cup unsweetened cocoa powder (more to your tastes)
• 1/2 cup milk
• 2 -3 cups of powdered sugar (more or less to achieve desired consistency)