Sweet potato casserole is a favorite Thanksgiving side dish, but you don't have to wait until then for it. It teams well with turkey, but it's also perfect with pork or chicken.
Preheat the oven to 350 degrees and lightly grease an 11-by-7-inch baking dish with cooking spray.
Put the sweet potatoes in a pot just large enough to fit and fill with water just to cover. Bring to a boil, and cook until tender, for 30-35 minutes. When cool enough to handle, peel the sweet potatoes, place in a bowl, and mash.
Combine the mashed sweet potatoes, melted butter, and next 4 ingredients. Beat at medium speed with an electric mixer until smooth. Spoon into the baking dish.
In a bowl, combine the brown sugar and remaining ingredients. Sprinkle over the sweet potato mixture. Bake for 30 minutes.