Ingredients
Method
- Preheat oven to 350°F. Grease a 13x18-inch sheet pan and line with parchment.
- Whisk flour, sugar, baking powder, and salt in a bowl.
- Beat butter until smooth, then add eggs one at a time.
- Alternate adding dry mix and milk to the butter mixture. Stir in vanilla bean.
- Spread batter in pan and bake 20–25 minutes, or until a toothpick comes out clean.
- Cool completely. Spread a thin layer of vanilla buttercream.
- Arrange personalized iced cookies on the cake right before serving.