Cookie exchange day 5-peanut brittle

My grandma's favorite holiday treat! Every year she looks forward to my home made peanut brittle. She starts talking about it in late September.

Original Recipe Yield 1 pound

Ingredients
1 cup white sugar
1/2 cup light corn syrup
1/4 teaspoon salt
1/4 cup water
1 cup peanuts
2 tablespoons butter, softened
1 teaspoon baking soda

Directions
Grease a large cookie sheet. Set aside.
In a heavy 2 quart saucepan, over medium heat, bring to a boil sugar, corn syrup, salt, and water. Stir until sugar is dissolved. Stir in peanuts. Set candy thermometer in place, and continue cooking. Stir frequently until temperature reaches 300 degrees F (150 degrees C), or until a small amount of mixture dropped into very cold water separates into hard and brittle threads.
Remove from heat; immediately stir in butter or margarine and baking soda; pour at once onto cookie sheet. With 2 forks, lift and pull peanut mixture into rectangle about 14x12 inches; cool. Snap candy into pieces.