First, in a microwaveable bowl, mix one cup of peanuts, one cup of white granulated sugar, a pinch of salt, and 1/2 cup of light corn syrup. Mix well.
Place mixture in microwave (uncovered) for 3 minutes and 30 seconds.
Next, take the bowl out and stir.
Place bowl back in the microwave for three more minutes.
While the mixture is in the microwave, take out a cookie sheet and grease it with butter.
Next, add one teaspoon of butter and one teaspoon of vanilla to the mixture. Dump them both in without mixing.
Put bowl back in microwave for one minute and 15 seconds.
Take bowl out of microwave and quickly mix in 1/2 teaspoon of baking soda. The color of your mix will change a bit with the addition of the soda.
Stir the mixture as fast as you can while handling the very hot bowl.
Pour the mixture onto the greased cookie sheet and spread the mixture as fast as you can.
Allow the candy to harden about 10-15 minutes before breaking it into jagged pieces.