INGREDIENTS Yield: 12 servings 2 cups (440 g) sugar ½ cup + 2 tablespoons (140 g) butter, softened 3 eggs, separated 2 cups (220 g) all-purpose flour 7 tablespoons unsweetened cocoa powder 1 teaspoon baking powder 1 teaspoon baking soda 1 teaspoon vanilla extract ½ cup boiling water 1 cup sour cream Ingredients for frosting […]