Heat oven to 350°F.
Place Bruce’s Yams Cut Sweet Potatoes in a shallow baking dish; set aside.
Combine butter, sugar and syrup in a small saucepan. Bring to a boil, reduce heat and simmer until thicken, stirring occasionally.
Pour sauce over sweet potatoes, sprinkle with nutmeg & cinnamon and top with marshmallows bake for 20-30 minutes. Sprinkle with nutmeg and/or ground cinnamon. Don't over fill pan or marshmallows to avoid leaking.
NOTE : Can make the day before for thanksgiving. Reheat in the oven at 350 degrees for about 30 minutes.