How to Bake Delicious Heaven & Hell Sheet Cake

Ingredients

• 1 cup (120g) all-purpose flour
• 1 ½ cups (300g) granulated sugar, divided
• ½ teaspoon salt
• 1 cup (240ml) egg whites (about 8 large eggs)
• 1 teaspoon vanilla extract
• ¼ teaspoon cream of tartar
• 1 ¾ cups (220g) all-purpose flour
• 1 ½ cups (300g) granulated sugar
• ¾ cup (65g) unsweetened cocoa powder
• 1 ½ teaspoons baking powder
• 1 ½ teaspoons baking soda
• 1 cup (240ml) buttermilk
• ½ cup (120ml) vegetable oil
• 2 large eggs
• 2 teaspoons vanilla extract
• 1 cup (240ml) boiling water