Peanut Butter Sandwich cookies

This recipe is from the kitchen of: Emily Grace
I ♥ sandwich cookies! But with peanut butter?! These were sooo good! Thank you, Emily Grace, for the recipe and the beautiful picture of them!

Ingredients:
1 c. butter
1 c. creamy peanut butter
1 c. sugar
1 c. packed b. sugar
3 eggs
1 t. vanilla extract
3 c. flour
2 t. b. soda
1/4 t. salt

Filling:
1/2 c. creamy peanut butter
3 c. powdered sugar
1 t. vanilla extract
5-6 tablespoons milk


Directions:
1.) In a large mixing bowl, cream the shortening, peanut butter, and sugars. Add eggs. one at a time, beating well after each addition. Add vanilla. Combine the flour, baking soda and salt; add to creamed mixture and mix well.
2.) Shape into 1-in. balls and place 2 in. apart on ungreased baking sheets. Flatten to 3/8-in. thickness with fork. Bake at 375 for 7-8min or until golden. Remove to wire racks to cool.
3.) For filling, in a large bowl beat the peanut butter, powdered sugar, vanilla and enough milk to achieve spreading consistency.(I ended up using more milk than it suggested) Spread on half of the cookies and top each with another cookie.