Make this in a microwave!
Times are for a 1200-watt microwave. Add 1 minute to each segment for 800-watt ovens.
1/3 cup white corn syrup
1 cup sugar
1 cup dry-roasted peanuts
1 teaspoon butter
3/4 teaspoon vanilla
1 teaspoon baking soda
Spray a baking sheet with butter-flavored nonstick cooking spray (or use regular butter). In a 4-cup Pyrex measuring cup, combine corn syrup and sugar. Microwave on HIGH 3 minutes. Add peanuts and microwave on HIGH 2 minutes. Add butter and vanilla, and microwave on HIGH 1 minute. Stir in baking soda, and quickly pour out on greased baking sheet. Spread it out if it looks thick. (It'll look like you ruined it at first, but it regains its rounded shape as it cools.) Once it's hard, after about 5 minutes, break into small pieces.