Mash the potatoes, add some melted butter, an egg, sugar, cinnamon and a bit of salt. Stir to mix.
As a topping, mix together crushed crackers, brown sugar and remaining melted butter. Sprinkle over the potato mixture. Bake at 350 for 20-25 mins.
The topping should be nicely browned. Your house will smell great, too. Enjoy!