Better Together Chocolate Vanilla Birthday Cake

Bahan-bahan (18 porsi)

• 3 cups all purpose flour
• 1 1/2 teaspoons baking powder
• 1 teaspoon baking soda
• 1 1/2 teaspoons kosher salt
• 3 sticks (1 1/2 cups) unsalted butter, at room temperature
• 2 cups granulated sugar
• 4 large eggs
• 1/4 cup greek yogurt
• 1 1/2 cups whole milk or buttermilk
• 1 tablespoon vanilla extract
• 3/4 cup cocoa powder
• 1/4 cup hot black coffee
• 4 sticks (2 cups) salted butter, softened to room temperature
• 4 cups powdered sugar
• 1 tablespoon vanilla extract
• 1/2 cup unsweetened cocoa powder
• 1/4 cup heavy cream