3 ¼cupscake flour,spooned and leveled, then sifted
3tspbaking powder
1tspcoarse Kosher salt(if using table salt, use half the amount)
2large eggs,room temperature
2large egg whites,room temperature
1 ½cupswhole buttermilk,room temperature
½cupunsalted butter,melted, and then cooled for 10 minutes
½cupvegetable oil
2tspvanilla extract
Buttercream
2cupsunsalted butter,softened to room temperature
½vanilla bean, seeds scraped
4cupspowdered sugar
1tbspmeringue powder(optional)
¼tspcoarse Kosher salt(if using table salt, use half the amount)
2tspvanilla extract
2-4tbspmilk or cream,only if needed for consistency
Instructions
Cake
Preheat the oven to 350F, position a rack in the center of the oven, and spray the bottoms of three 8-inch cake pans with non-stick spray.
In a large bowl, measure out the sugar. Scrape the seeds from the vanilla bean pod and use your fingers to rub the seeds into the sugar until very fragrant and the seeds are evenly dispersed throughout the sugar.
Set a fine mesh sifter over the bowl of sugar, and sift in the cake flour, baking powder and salt. Use a whisk to combine the dry ingredients well.
In another large bowl, whisk together the eggs, egg whites, buttermilk, melted butter, oil and vanilla extract until smooth.
Add the dry ingredients to the wet, and whisk until combined, about 10-15 seconds. A few lumps in the batter are okay; take care not to over mix. Divide the batter between the cake pans. Tap a few times against the counter to pop any large air bubbles.
Bake the cakes for about 21-25 minutes, or until a cake tester or a toothpick comes out clean, and the tops spring back when lightly touched.
Set the pans on a wire rack, cover them loosely with a clean kitchen towel, and cool completely before frosting. When ready to frost and assemble the cake, remove the cakes from the pans.
Buttercream
In the bowl of your stand mixer fitted with the paddle attachment, beat the butter and vanilla bean seeds for 1 minute until smooth.
With the mixer running on low, add the powdered sugar by spoonfuls, the meringue powder and the salt, mixing until thick and combined.
Add the vanilla; increase speed to medium and whip for 4-5 minutes, scraping the bowl down several times, until light and fluffy. Add the milk only if needed for desired consistency. Note that in warmer weather, when the butter is softer, you'll rarely need to add the milk.
Fill and frost the cooled cakes with the buttercream.
For the naked cake pictured in today's post, fit a piping bag with tip 1M and fill with buttercream. Place one layer of cake on your cake stand or cake board. Starting at the center of the cake, pipe a swirl from the center to the outer edge, to form a large rosette. Place another cake layer on top, and repeat. You'll have leftover buttercream if you leave the sides unfrosted, which you can freeze in a freezer bag for another baking project.Note that naked cakes can dry out faster, since they aren't covered in buttercream to keep the sides moist. So be sure to keep the cake tightly covered in an airtight container until ready to serve.
Notes
Leftover cake should be stored in an airtight container or cake carrier, at room temperature, for up to 3 days.Recipe Updates: Note that I originally developed and published this recipe in 2015, but in re-testing and improving the recipe over the years, I've updated it to the current recipe that's now published in this post. For those of you who have made and love the first recipe, here is the original list of ingredients. The mixing and baking instructions are the same.