Chocolate Butter Cake

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
• 12 ounces unsalted butter at room temperature
• 1 1/2 cups buttermilk
• 3 eggs
• 1 1/2 cups coffee freshly brewed, cooled to room temperature
• 3 3/4 cups cake flour
• 2 1/2 cups sugar
• 1 15/16 tablespoons baking powder
• 1/2 teaspoon salt
• 10 ounces unsalted butter at room temperature
• 1 9/16 cups buttermilk
• 5 whole eggs
• 2 egg yolks
• 2 1/2 teaspoons vanilla extract