INGREDIENTS
3/4 cup
unsalted butter, softened
1 3/4 cups
granulated sugar
1 1/2 tsp
vanilla extract
2
large eggs plus 1 egg yolk
1 1/4 cups
whole milk
1 1/2 cups
all-purpose flour
1 1/2 cups
cake flour
2 1/2 tsp
baking powder
1/2 tsp
kosher salt
1 cup
milk chocolate morsels
1/4 cup
unsalted butter
1/2 cup
sour cream
1/4 cup
dark chocolate unsweetened cocoa powder
kosher salt
3 cups
powdered sugar
3 tbsp
whole milk
Sprinkles, optional