1/4 cup unpopped corn kernels
a dab of water
Large glass casserole bowl with lid
Update: 4/18/20 - my casserole dish broke, now I use a empty saltine cracker box. Works great. Just don't add water.
Add corn kernels to a cup.
Add a dab of water.
Stir kernels so they all get wet.
Put kernels into casserole dish.
Cover and microwave on high for 7-8 minutes.
Note: kernels start popping after about 4 minutes. Stop cooking when the popping stops.