INGREDIENTS
2 1/2 cups
all purpose flour, plus more for rolling
2 tsp
baking powder
1/2 tsp
salt
8 tbsp
unsalted butter, at room temperature
1 cup
sugar
1
egg
1/4 cup
milk
1 tsp
vanilla extract
3 oz
pasteurized egg whites
3 1/2
to 4 cups confectioners sugar
food coloring
sprinkles