For an extra touch of richness, try browning 1 tablespoon of butter and adding it to the mashed sweet potato mixture. A sprinkle of toasted pecans or walnuts adds a delightful crunch and nutty flavor. If you don’t have ramekins, you can bake the sweet potatoes directly on a baking sheet. Feel free to experiment with other spices, such as cardamom or allspice, to create your own unique flavor profile. To make ahead, prepare the stuffed sweet potatoes up to the baking stage. Cover and refrigerate for up to 24 hours. Add a few minutes to the baking time when cooking from cold.