Lemon Cake with White Cream Filling, Whipped Cream Frosting, White Chocolate Shavings, and Sicilian Lemon Jelly Ingredients: For the Lemon Cake: 2 cups sugar 1 cup unsalted butter, softened 4 eggs 2 tablespoons grated lemon zest 3 cups all-purpose flour 2 teaspoons baking powder 1/2 t