Ingredients
- ½ cup salted butter softened
- 1 cup white sugar
- 1 ½ cups all purpose flour
- 1 tablespoon baking powder
- 4 egg whites
- ½ cup whole milk
- 1 tablespoon vanilla extract
Instructions
- Preheat the oven to 350 degrees and grease a square 8x8-inch pan or one 9-inch round pan.
- In a bowl, cream together the butter and sugar.
- In a separate large bowl, combine flour and baking powder and mix well.
- In a third separate bowl, add the egg whites and whip until light and fluffy- about 2 minutes.
- Add the butter/sugar mixture to the flour and baking powder mixture. Mix well.
- Stir in the milk and vanilla extract until combined.
- Gently fold in the egg whites until just combined.
- Pour mixture into the greased 8x8 pan and bake for 30 minutes at 350 or until a toothpick comes out clean when inserted in the center of the cake.