Brownie Sandwich Cookies with Chocolate Chip Cookie Dough Frosting

INGREDIENTS

1/2 cup

unsalted butter

12 oz

good quality semi-sweet chocolate chips

1 1/2 cups

all-purpose flour

1/4 cup

unsweetened cocoa powder

1/2 tsp

baking powder

1/4 tsp

baking soda

1/2 tsp

salt

1/2 cup

packed light-brown sugar

1/2 cup

granulated sugar

large eggs

2 tsp

vanilla extract

Frosting!

15 tbsp

salted butter (, softened)

3/4 cup

packed dark-brown sugar*

2 cups

powdered sugar

3/4 cup

all-purpose flour

1 1/2 tsp

vanilla extract

3 tbsp

half and half

1 cup

mini semi-sweet chocolate chips