2cupsblueberriescan use fresh or frozen blueberries
Instructions
Preheat oven to 350℉. Butter the bottom and sides of a 9x13" pan and line the bottom parchment paper.
Whisk the flour, baking powder and salt together in a medium bowl.
In a large bowl, beat the butter and sugar until it is light and fluffy. Beat in the four egg yolks one at a time. Add the vanilla to the mixture.
Add the flour mixture and milk alternately, starting and ending with one third of the flour. Stir just until the flour is incorporated.
In a clean, large bowl, using clean beaters, whip the egg whites to soft peaks. Stir one third of the egg whites into the batter, then gently fold in the rest. Very gently fold in the berries.
Pour the batter into the prepared pan and bake until a toothpick inserted into the center comes out clean, 25-30 minutes. Remove cake from oven and let cool in minutes in the pan. Cut pieces directly from the pan to serve.