Peanut Planks

Cover a baking sheet with aluminum foil. Cook sugar over medium heat, in a 10-inch cast iron skillet or similar heavy pan. Stir constantly until sugar is caramelized (turns brown). Remove skillet from heat; stir in peanuts. Immediately pour sugar-peanut mixture onto baking sheet. Using a rolling pin, quickly roll candy to a very thin sheet. Mark candy into squares with a knife. Allow to cool, and then break into squares. Store in an airtight container. Yields about 1 1/2 pounds.