Method:
Prick the sweet potatoes with a fork and bake in a 190 degrees C oven for 45mins to an hour depending on the size of the potatoes. When cooked, scoop out the flesh into a bowl and and mash. Add the butter, maple, salt and pepper and mix well.
Adjust the seasoning and serve.
Also if you are a true American you can replace the maple syrup with marshmallows.