Question: how long do you microwave a potato in a bag?
Answer: Close the flap. (NOTE: To close the flap, Don't fold the flap as it was for packaging, just pull the flap down towards the bottom of the bag as far as it will go, even if this causes the bag to fold over) and cook on high, 4 to 6 minutes, depending on the number & size of the potatoes, and the power of the microwave.