Yes! Simply place your dough balls onto an ungreased baking sheet and press the peanut butter cup into them as soon as they finish baking. Keep in mind, the dough will spread out a bit on the baking sheet so you may not end up with perfectly formed cookies. Alternatively, top with a Hershey kiss to make a blossom style cookie instead! (Or even smash the cookie with a fork to make standard peanut butter cookies.)