DIY Microwave Popcorn (some tips I have learned from other places: fit a second paper bag down over the first to make a "box" and no kernals escape in the microwave. DO NOT use recycled paper because the little bits of metal can wreck your microwave)
Get a brown paper lunch bag. Add a cup scoop of popcorn kernels to bag. Fold the bag over twice. Stick the bag in the microwave. Set it for 3 minutes on high….BUT…STOP the microwave when the popping slows to one to two pops per second to avoid burning.