These are the sweet potatoes that we had at every Thanksgiving when I was growing up, and I have carried on the tradition of making this recipe each year, and now my daughters want to make them for their families. The amount of ingredients may vary, if the potatoes begin to get too brown, add more oj and Karo and butter. Keep some extra cinnamon/brown sugar in a container while cooking, just in case.
Wash and peel the sweet potatoes. Slice into 3/4 inch rounds. Combine 4 tsp cinnamon with 3/4 cup brown sugar, set aside.
Melt half the butter in a large skillet over medium heat. Add 1/2 the Karo syrup, 1/2 cup of orange juice, and the cinnamon/brown sugar mixture to the pan. Add the potatoes in a single layer, cook , turning once, until golden brown around the edges and soft in the middle. Continue cooking layers of potatoes until all are cooked.
Place all cooked potatoes in a large buttered casserole dish with lots of surface area. Bake at 350 for 20-30 minutes. Remove them from the oven and top with the mini-marshmallows, place back in the oven and don't shut the door completely and don't even think about walking away. When marshmallows begin to get nicely browned on top (which will happen in the blink of an eye), remove casserole from the oven. Done!