project wedding cake: the cake is baked

INGREDIENTS

• 3 cups cake flour
• 3 cups sugar
• 1 1/2 cups unsweetened cocoa powder (not Dutch process)
• 3 teaspoons baking soda
• 3/4 teaspoon ground cinnamon
• 3/4 teaspoon salt
• 3 sticks (12 ounces) unsalted butter, at room temperature
• 1 1/2 cups buttermilk
• 3 eggs
• 1 1/2 cups freshly brewed coffee, cooled to room temperature
• 3 3/4 cups cake flour
• 2 1/2 cups sugar
• 1 tablespoon plus 2 3/4 teaspoons baking powder
• 1/2 teaspoon salt
• 2 1/2 sticks (10 ounces) unsalted butter, at room temperature
• 1 1/4 cups plus 1/3 cup buttermilk
• 5 whole eggs
• 2 egg yolks
• 2 1/2 teaspoons vanilla extract