1Butter a cookie sheet. Combine sugar and corn syrup in a 2 quart glass bowl and microwave on high 4 minutes. Stir in peanuts and microwave on high 3 1/2 minutes more, then stir in butter and vanilla and microwave for 1 1/2 minutes.
2Stir in baking soda until light and foamy. Pour onto cookie sheet and spread thin. Cool completely and break into pieces and serve.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.