Perfect Party Cake

Bahan-bahan (14 porsi)

• 2½ cups cake flour
• 1 tablespoon baking powder
• 1/2 teaspoon salt
• 1¼ cups buttermilk
• 4 large egg whites
• 1½ cups granulated white sugar
• 2 teaspoons freshly grated lemon zest
• 1/2 cup (1 stick) unsalted butter, (at room temperature)
• 1/2 teaspoon lemon extract
• 1 cup granulated white sugar
• 4 large egg whites
• 1½ cups (3 sticks) unsalted butter, (at room temperature)
• 1/4 cup (about 2 lemons) freshly squeezed lemon juice
• 1 teaspoon vanilla extract
• 2/3 cup raspberry preserves ((stirred vigorously until spreadable))
• fresh raspberries, (for garnish-- and in-between layers, if you'd like)