INGREDIENTS
2 1/2 tsps
baking powder
1 1/2 cups
cake flour
1/4 cup
cocoa powder
2 larges
egg yolk
1 1/2 cups
flour
1 3/4 cups
granulated sugar
1/2 tsp
kosher salt
1 cup
milk chocolate morsels
3 cups
powdered sugar
1/2 cup
sour cream
12 servings
sprinkles
3/4 cup
unsalted butter
1 1/2 tsps
vanilla extract
1 1/4 cups
whole milk