For the thickest, chewiest cookies, do not skip the chilling time. This step is essential to prevent the dough from spreading too much while baking. When adding the chocolate kiss, wait 1-2 minutes after the cookies come out of the oven to prevent the chocolate from melting and losing its shape. Expect the cookies to crack slightly, which is the classic look! Store these soft cookies in an airtight container at room temperature for up to 4 days.