Alton Brown's Plain Brown Popper recipe.
DIY Microwave Popcorn
1/4 cup popcorn kernals
2 teaspoons popcorn oil
1/4 teaspoon popcorn salt
Mix ingredients together and pour into a brown paper lunch bag. Staple closed (staples will not spark in microwave, it's okay). Lay a paper towel underneath the bag to make clean up easier. Microwave for approximately 2 minutes 20 seconds, or until there are a few seconds between pops. Carefully remove bag from microwave and cut open with a pair of scissors. Enjoy!