1. Preheat oven to 400. With a fork, poke potatoes in several places.
2. Wrap in square foil on baking sheet and bake for 45 minutes- being sure not to rip foil when wrapping.
3. Tuck foil under to the sides of each potato- being careful not to burn yourself.
4. Cut a deep cross in the top of each potato- reaching 3/4 of the way down the potato.
5. Slowly push together the ends to create an opening.
6. Sprinkle inside with salt and pepper.
7. Add 1 tbsp butter to each potato.
8. Add 2 tsp sugar to each potato.
9. Sprinkle 12 marshmallows on each potato.
10. Set oven to High broil and put under broiler for a 4 minutes, making sure to move pan inside the oven at 1 minute intervals.
11. The marshmallows should be light brown in color.