Chocolate Chip Cookie Dough Cupcakes

INGREDIENTS

For the yellow cupcakes:

1 1/2 cups

all-purpose flour (6.35 ounces)

1 1/4 tsp

baking powder

1/4 tsp

fine salt

1 cup

granulated sugar

1 stick

unsalted butter, at room temperature

large egg plus 1 egg yolk

1 tsp

vanilla extract

1/2 cup

sour cream

For the chocolate chip cookie dough frosting:

2 sticks

unsalted butter, at room temperature

3/4 cup

light brown sugar

1 1/4 cups

all-purpose flour

1/2 tsp

fine salt

1 tsp

vanilla extract

to 4 tablespoons milk (any kind)

Miniature chocolate chips