A typical slice of this nutty dessert can cost you over 500 calories. Top it with a scoop (1/2 cup) of vanilla ice cream, and you may be pushing 650 calories and 8g saturated fat. We’re not saying “never” to pecan pie, but keep this for a special occasion and use moderation as your guide. Choose pumpkin pie or sweet potato pie for a lower-calorie option. Or try our lightened version, which has just 311 calories and the benefits of a whole grain: oats.