Put the popcorn in a microwaveable bowl and cover.
I was going to use a plate, but wasn’t sure it would stand up to the length of cooking time with not much moisture in there. I didn’t want to crack it, so I used cling film over the top of the bowl.
Now, microwave at 800 watts for 4-5 minutes. I had to turn my microwave power down. If you can’t turn yours down, just keep an eye on them.
They will take a little while to start, but when they do it's fast and furious. There are always kernels that refuse to pop, and I haven't yet found a way to make them.
Remove all the popped kernels from the bowl and dress with the butter, melted, and salt and pepper