Triple-Layer White Cake with Orange Curd Filling Recipe

Ingredients

• 1/4 cup fresh lemon juice
• 2 teaspoons unflavored gelatin
• 1 1/2 cups sugar
• 1 cup orange juice
• 9 large egg yolks
• 3 tablespoons orange zest
• 2 teaspoons lemon zest
• 3/4 cup (1 1/2 sticks) unsalted butter, cut into 1/2-inch cubes
• 2 3/4 cups cake flour
• 1 1/4 cups granulated sugar
• 3/4 teaspoon baking powder
• 1/2 teaspoon salt
• 3/4 cup vegetable oil
• 4 large egg yolks
• 6 tablespoons sour cream
• 1/2 cup plus 1 tablespoon whole milk
• 2 teaspoons grated orange peel
• 1 1/2 teaspoons vanilla extract
• 6 large egg whites (see note on separating eggs, start with room temperature egg whites)
• Pinch salt
• 2/3 cup granulated sugar
• 10 ounces cream cheese, room temperature
• 10 tablespoons (1 1/4 sticks) unsalted butter, room temperature
• 1 2/3 cups powdered sugar