Mike'S Peanut Brittle

Directions

1. 1
   Cook sugar, Karo and water in big kettle until it reaches crack stage, 275° on a candy thermometer.
2. 2
   Add peanuts, stirring until it reaches 300°.
3. 3
   Remove from fire and add vanilla, soda and butter. Stir until butter melts.
4. 4
   Pour out on 2 1/2 feet of foil that has been buttered thoroughly, stretching candy to desired thickness as it cools.
5. 5
   When cool, break in pieces and store in airtight container.