Cream butter, peanut butter, and sugars in a large bowl. Add vanilla extract and eggs, beat till well combined.
Stir in dry ingredients.
Roll dough in balls and place in well greased mini muffin pans.
Bake for 8-10 minutes. (While they are baking, unwrap all the Reese’s.)
Remove from oven and immediately press a Reese’s in the middle of each cookie till even with the top. Let cool in pans for a few minutes before removing to cooling racks.