Choosing a piece of pie is always a tough choice, so maybe we can help a little bit. Dobbins notes that among holiday favorites, pumpkin might be your best bet and pecan might be the worst. An average slice of pecan has a little over 500 calories, while pumpkin boasts slightly over 300. The classic apple pie is right in between the two, coming in at a bit over 400 calories. All of them boast small quantities of several vitamins and minerals, except pumpkin pie, which has more than a full day’s worth of Vitamin A.