Red Velvet Layer Cake

Ingredients

• red velvet cake
• vegetable shortening
• nonstick cooking spray with flour
• 21/4 cups all-purpose flour
• 2 cups granulated sugar
• 1/2 cup plus 3 tablespoons unsweetened dutch-process cocoa powder
• 3/4 teaspoon baking powder
• 3/4 teaspoon baking soda
• 3/4 teaspoon regular salt
• 3/4 cup buttermilk
• 2 sticks (1 cup) unsalted butter, melted
• 2 large eggs
• 2 large egg yolks
• 11/2 teaspoons pure vanilla extract
• 1 tablespoon red food coloring (1/2 ounce)
• 3/4 cup boiling water
• cream cheese buttercream
• 3/4 cup 100% white grape juice
• 3 ounces philadelphia cream cheese, at room temperature
• 2 sticks (1 cup) unsalted butter, at room temperature
• 2 large egg yolks
• 2 tablespoons sugar-free maple syrup
• 4 teaspoons pure vanilla extract
• pinch of ground cinnamon