Oven method: Preheat oven to 400°F. Prick potatoes a few times with a fork. Place on baking sheet and bake 50 to 60 minutes, or until soft when pierced by a fork. Allow to cool slightly before serving, 5 to 10 minutes. Split potatoes open and sprinkle with ground cinnamon, nutmeg, cloves, ginger, or allspice.
Microwave method:Prick potatoes twice with a fork. Place side by side on a paper towel in center of microwave oven. Cook on high 5 to 8 minutes, or until soft when pierced by a fork. [Prepare ahead, wrap in foil and they will continue to cook and soften.] Sprinkle with ground cinnamon, nutmeg, cloves, ginger, or allspice.