Ingredients
Method
Step-by-Step
- Heat the oven to 350°F (175°C). Grease three 8-inch round cake pans and line the bottoms with parchment paper.
- Whisk or sift together the cake flour, sugar, baking powder, and salt. Add the softened butter and mix until the dry ingredients look fine and sandy.
- Add the oil and mix briefly. In a separate bowl, combine the room-temperature buttermilk, egg whites, vanilla extract, and white vinegar.
- Add the liquid mixture to the dry ingredients in two or three additions, mixing just until smooth after each addition. Do not overmix.
- Divide the batter evenly among the prepared pans. Bake for 25–30 minutes, until the tops spring back lightly and a toothpick comes out clean or with a few moist crumbs.
- Cool the cakes in their pans for about 10 minutes. Turn them onto wire racks and cool completely, at least 1 hour, before filling and frosting.
Notes
For the most even layers, weigh the batter as you divide it among the pans. Store the finished frosted cake covered at room temperature for up to 2 days or refrigerate it for up to 4 days; let chilled slices sit briefly before serving.
