Sweet Potato Casserole With Marshmallows and Pecans

This sweet potato casserole combines smooth, buttery sweet potatoes with brown sugar, cinnamon, crunchy pecans and a layer of toasted marshmallows. The creamy filling can be prepared ahead, making this an especially convenient side dish for Thanksgiving or Christmas. The marshmallows are added towards the end so they become golden without burning. Serve this sweet