Place the potatoes on a roasting tray and bake until tender, about 1 hour and 15 minutes.
Remove the potatoes from the oven and allow them to cool enough so you can easily handle them
Cut the top third of the potatoes (lengthwise) off.
Scoop out the potato flesh into a bowl or directly into a food processor, leaving only enough on the sides for the skins to keep their shape.
Also add 2 tablespoons of the sugar, cinnamon, nutmeg, cayenne pepper and butter to the food processor.
Blend until completely combined and smooth.
Season with salt and pepper to taste.
Drizzle a roasting tray with a bit of oil.
Set the potato skin bases upright on the tray and fill them with the blended mixture.
Combine the remaining 3 tablespoons of sugar and bacon in a small bowl.
Sprinkle the tops of each stuffed sweet potato with the sugar-bacon topping.
Bake for 10 more minutes.