Preheat the oven to 350°F. Line a baking sheet with parchment paper.
Melt the butter in a large, microwave safe bowl. Mix in the salt, cayenne, and cinnamon.
Add the sweet potato cubes and toss until evenly coated.
Wrap 1 piece of bacon around each potato cube and fasten with a toothpick. Place all the wrapped potatoes onto the baking sheet. Sprinkle with the brown sugar.*Alternative Tip:Place the brown sugar in a bowl and dip bacon strips on one or both sides in the brown sugar. Then, wrap the coated bacon around the sweet potato cubes.
Bake for 38-40 minutes or until the bacon is crips and the potatoes are tender.