Homemade Nutter Butters - Peanut Butter Sandwich Cookies

INGREDIENTS

For the Cookies:

1 cup

salted butter, room temp (just slightly soft, not melty at all)

1 cup

creamy peanut butter, room temp

1 cup

white sugar

1 cup

light brown sugar, packed

large eggs, room temp

2 tsp

vanilla extract

2 1/2 cups

all purpose flour

1 tsp

baking soda

1 tsp

baking powder

Granulated sugar for sprinkling

For the Filling:

1 cup

salted butter, room temp

1 cup

creamy peanut butter, room temp

and ¾ cups powdered sugar

TB whole milk