- Preheat oven to 350˚. Place rack in center of oven.
- Butter a 1.5- or 2-quart casserole dish and set aside.
- Combine sweet potatoes, egg, brown sugar, milk, and applesauce together in a medium bowl. Pour into prepared casserole dish.
- For topping, combine melted butter, brown sugar, flour, and pecans. Sprinkle over sweet potato filling.
- Bake 30 minutes or until topping has browned.