Holy Moly were these good. I wasn't sure how good these would be so I just sliced up 1 cored apple as thinly as I could and put them on a cooling rack on top of a cookie sheet. Then I sprinkled some cinnamon on them and put them in a 210 degree oven for 90 minutes. I used convection but if you do not have that feature with your oven, never fear. It will just take a little longer for yours to finish. They are well worth the wait. Needless to say, my apple never made it past that cookie sheet. I finished all of it while I was straightening up the kitchen. Try it! It is a delicious snack anytime and so good for you!