I often get asked wether or not to use liners for muffins and cupcakes. The answer we all hate: It depends. It depends on the type of muffin/cupcake as well as what you're doing with them (i.e. if you're serving at a party and people are grabbing from a tray I think liners are a good idea). For these Butterscotch Pumpkin Muffins I actually made half in liners, half directly in a greased muffin tin because I ran out, so it’s totally up to you. But definitely grease the pan if you choose to bake without them.