Brownie Sandwich Cookies with Chocolate Chip Cookie Dough Frosting

INGREDIENTS

Eggs, large

1/2 tsp

Baking powder

1/4 tsp

Baking soda

1 1/4 cups

Brown sugar, packed light

1/4 cup

Dutch processed cocoa, powder

2 cups

Flour

1/2 cup

Granulated sugar

1 cup

Powdered sugar

1 tsp

Salt

2 cups

Semi-sweet chocolate chips

1 cup

Semi-sweet chocolate chips, mini (or regular)

1 1/2 tbsp

Vanilla

1/2 cup

Butter, unsalted

15 tbsp

Butter, salted

3 tbsp

Cream