Traditionally apple butters are made with cinnamon, and occasionally another spice or two, but I went the "creative" (or simple) route with Chinese Five Spice powder: cassia cinnamon, cloves, star anise, anise seed, and ginger. I'm in love with the complexity it adds, and the depth of the flavors. I highly recommend it, especially if having a house full of warm apple spices sounds just as good to you on a cold winters day as it does to me.