Wash sweet potatoes really well. Poke with a fork, wrap in a damp paper towel and microwave for 5-7 minutes until cooked through and soft (time may vary depending on the microwave).
While sweet potatoes are cooking, in a small bowl mix together the brown sugar, cinnamon, and dash of nutmeg. Set to the side.
Preheat broiler in the oven.
Once the sweet potatoes are done cooking, melt 1 tablespoon of butter in the microwave.
Carefully open up the sweet potatoes (I like to use a fork and poke holes and gently open the potato). Divide the cinnamon sugar mixture between the two potatoes and mix well inside the sweet potato. Add a handful of mini marshmallows to each potato and then drizzle with melted butter.
Broil for 1-2 minutes until the marshmallows are toasted.