* To achieve the right texture here, the butter must be softened at room temperature for a few hours. If you forget to do this, cut a stick of butter into 8 even slices and place in the stand mixer bowl (or on a plate). The slices shouldn’t be touching each other. Set the bowl in a warm spot for 1 hour, and the butter should be soft enough to use for this recipe.
** For perfectly round slice and bake cookies, place wrapped log of dough in an empty paper towel roll that’s been cut open lengthwise. Tighten the roll around the dough, then secure with rubber bands or tape. Chill in the freezer according to the instructions above.