How to Make: Pre-Heat oven to 400 FMakes 1 casserole to serve 8-10.1. Melt butter in a microwave safe bowl.2. Peel sweet potatoes. Cut into squares.3. Place potatoes in a buttered casserole dish. 4. Pour butter over and stir. Add the brown sugar and cinnamon. Stir.5. Add cranberries and stir.6. Bake for 40 minutes.7. Carefully take out of the oven. Sprinkle marshmallows on top. Bake another 5 minutes. Enjoy!