Chocolate Cake Recipe

INGREDIENTS

• 1 cup low-fat buttermilk
• 1 cup (2 sticks) unsalted butter, plus more for pans
• 2 cups all-purpose flour (spooned and leveled), plus more for pans
• 1/2 cup unsweetened cocoa powder
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon salt
• 1 1/2 cups sugar
• 2 large eggs plus 3 large egg yolks
• 2 teaspoons pure vanilla extract
• Whipped Frosting
• Shaved dark chocolate