Step 1

Preheat oven to 375 degrees F. Prepare a 9 X 13-inch baking dish with cooking spray. Bring a large pot of water to boil on the stove.

Step 2

Place potatoes into a large pot of boiling water. Boil for approximately 25 minutes until they are just fork tender

Step 3

Remove from water and allow to cool until they can be easily peeled by hand. The skin will easily come off at this point. Cut potatoes into small cubes and place into a large bowl.

Step 4

In a small saucepan over medium heat, combine molasses, cinnamon, brown sugar, and butter. Stir until smooth, about 5 minutes. Remove from heat and pour over potatoes. Toss to coat the potatoes in the glaze.

Step 5

Transfer the sweet potato mixture to a prepared baking dish. Sprinkle pecans over the potatoes. Cover with marshmallows.

Step 6

Bake for 30 minutes. Let cool and serve!