Kue Lapis Lemon

Bahan-bahan (12 porsi)

• 2 cups cake flour
• 1 tablespoon baking powder
• ¾ teaspoon salt
• ½ teaspoon baking soda
• 1 ½ cups granulated sugar (divided)
• ½ cup unsalted butter (melted)
• ¼ cup vegetable oil
• ½ cup buttermilk
• ½ cup fresh lemon juice
• 1 tablespoon lemon zest
• 1 teaspoon vanilla
• 4 eggs (separated)
• 4 egg whites
• 1 ½ cups granulated sugar
• 1 pound unsalted butter (softened)
• 3 tablespoons lemon zest
• pinch of salt