INGREDIENTS
1/2 cup
butter
1 cup
sugar
2
eggs
1 tbsp
vanilla extract
1 1/2 cups
flour
1 tsp
baking powder
1/3 cup
milk
1/3 cup
rainbow sprinkles (, plus more for decoration)
1 cup
butter, softened
2 1/2 cups
powdered sugar
1 tbsp
vanilla extract
1 tbsp
milk ((if needed for consistency))