INGREDIENTS
1/2
cup/110 grams unsalted butter (1 stick), slightly softened, more for pans
1 1/2
cups/190 grams all-purpose flour, more for pans
1 tsp
baking powder
1/4 tsp
baking soda
1/4 tsp
fine salt
2/3
cup/158 milliliters whole milk
1 1/2 tsp
pure vanilla extract
1
cup/200 grams sugar
1
whole egg plus 2 egg whites
1/3 cup
rainbow sprinkles (not pastel, or naturally colored)
8
ounces/225 grams cream cheese, slightly softened
1/2
cup/110 grams unsalted butter (1 stick), slightly softened
1/8 tsp
fine salt, more to taste
3
cups/300 grams confectioners’ sugar, sifted, more to taste
1/2 tsp
pure vanilla extract
1 cup
rainbow sprinkles (see note)