Adapted slightly from http://www.grouprecipe.com/
Ingredients For the Cookie:
1 1/2 cup Flour
1/2 cup Hershey's Coco Powder
1/2 tsp Baking Soda
1/2 cup (1 stick) I Can't Believe it's Not Butter for Cooking & Baking, softened
1/2 cup Sugar
1/2 cup Packed Brown Sugar
1/4 cup Peanut Butter
1 tbsp Milk
1 tsp Vanilla
2 Tbsp Granulated Sugar - For outside of cookie
Ingredients for the Filling:
3/4 cup Confectioner's Sugar - Sifted
1/2 cup Peanut Butter
Side note to be aware of is: DON'T use chunky peanut butter. That is what we have in our pantry but when I make this next time I will stick to the smooth stuff, especially for the filling.
Combine all of your dry ingredients in a bowl and mix together (Flour, Coco Powder & Baking Soda). Set aside. Preheat the oven to 350 F.
Combine the two types of sugar, softened butter and peanut butter in a Kitchen Aid mixer or large bowl using a hand mixer. Once it is well mixed, add the egg, milk and vanilla.
Mix well and then begin adding the dry ingredients little by little, 1 cup or so at a time. Allow the dough to form slowly, absorbing all of the flour.
If you are using a Kitchen Aid mixer unfortunately you have some dish washing to do before you continue.
In a large bowl using a hand mixer or using the Kitchen Aid mixer again, combine the peanut butter and sifted powdered sugar. Beat until smooth. This is where I ran into some trouble because my filling was very crumbly. I'm not sure why but after 4 or 5 minutes of mixing nothing happened so I added a Tbsp of milk to help it along which seemed to work.
Enjoy!! - Nicole