Ingredients
1cupunsalted butter,softened
1½cupssugar
2large eggs
2large egg yolks
2tspvanilla extract
2cupsflour
1tspbaking powder
¼tspsalt
1cupwhole milk
1cupunsalted butter,softened
2¼cupspowdered sugar
⅓cupunsweetened baking cocoa
2tbspmilk
1tspvanilla extract
Preparation
Preheat oven to 350 degrees F and spray a 9×13-inch baking pan with baking spray.
To stand mixer, add butter and sugar on medium speed, and mix for 1 to 2 minutes until light and fluffy.
Sift together the flour, baking powder, and salt in a medium bowl.
Add in the eggs and egg yolks one at a time, then add the vanilla extract.
Alternate adding in the milk and the flour mixture until just combined.
Spread into baking pan and bake for 30 to 35 minutes until lightly browned and cooked through.
In a clean stand mixer, cream together butter, powdered sugar, cocoa powder, milk, and vanilla.
Mix on the lowest setting until just mixed together, then raise the speed to medium-high, mixing for about 1 to 2 minutes until light and fluffy.
Wait until the cake has cooled before frosting.
