It is not possible to truly bake a potato in a microwave oven. When a potato is properly baked, the heat of the oven reaches the skin first, drying it and sealing in the potato's natural moisture so that the flesh steams as the skin crisps. This delicious contrast of textures cannot be achieved in a microwave oven, which merely cooks the potato.
You can bake small-sized baking potatoes relatively quickly, in about 30 minutes, in a hot oven; they will cook even quicker if you push a metal skewer through them. Alternatively, if you own a convection microwave, compromise and use the combination facility. For best results and to achieve a delicious contrast between crisp skin and soft interior, rub the potato skins with sea salt while they are still damp from washing. Baked potatoes are done when you can press them and feel that the flesh inside is soft and yielding.
** Asian Recipes