On my microwave, 2 minutes and 20 seconds delivered perfectly popped corn. Every microwave is different so test it out on yours to see if you need a little more or a little less time. Try to remove the bag when you hear the popping really start to slow.
Place popcorn in paper bag and place in microwave for 2 minutes and 20 seconds. Stop sooner if you hear the popping stop.
Remove from microwave, season to your taste, and enjoy!