The peanut butter stuffing is soft but not sticky. Still, it is quite a challenge to put it into the cookies and the most effective way to work with it is to chill it until it is more manageable or to freeze them. And to make sure the filling is consistent in all cookies, I scooped it out using my measuring spoon . Once scooped, I formed them into round balls and chilled them until they were firm. I made these in batches and took them out of the fridge, one batch at a time so that they don’t become soft again at room temperature while shaping the cookies.