Cake
- 8 tablespoons (113g) unsalted butter, at room temperature, at least 65°F
- 1 3/4 cups (347g) King Arthur Baker’s Special Sugar*
- 1/4 cup (50g) vegetable oil
- 2 teaspoons baking powder
- 3/4 teaspoon table salt
- 3 tablespoons (21g) King Arthur Bread and Cake Enhancer, optional
- 2 teaspoons King Arthur Pure Vanilla Extract
- 4 large egg whites plus 1 whole large egg, at room temperature
- 2 3/4 cups (330g) King Arthur Unbleached Cake Flour
- 1 1/2 cups (340g) full-fat plain, vanilla, or lemon yogurt, or whole milk, at room temperature
Filling & Frosting
- 1/2 cup (57g) Quick-and-Easy Pastry Cream Mix*
- 2/3 cup (152g) milk
- 1 1/2 cups (405g) prepared lemon curd*
- 2 cups (454g) whipping cream or heavy cream
*Also known as superfine or castor sugar.