Peanut Butter Sandwich Cookies

INGREDIENTS

For the Peanut Butter Cookies::

1/2 cup

unsalted butter, softened (1 stick)

1/2 cup

crunchy peanut butter

1/2 cup

sugar

1/4 cup

light brown sugar, lightly packed

1/2 tsp

vanilla extract

large egg

3/4 cup

all-purpose flour

1/2 tsp

baking soda

1/4 tsp

baking powder

1/4 tsp

sea salt

For the Peanut Butter Buttercream::

1/2 cup

butter, softened (1 stick)

1/2 cup

creamy peanut butter

1 cup

confectioner's sugar

1 tbsp

heavy whipping cream