Peanut Brittle - Betty Crocker Recipe

Here is my first try at peanut brittle.  A good candy thermometer is a must!  All I had was dry roasted peanuts, my husband said they worked..but the unroasted peanuts would make it even better.

1 1/2 teaspoons baking soda

1 teaspoon water

1 teaspoon vanilla
1 1/2 cups sugar
1 cup water
1 cup light corn syrup
3 tablespoons butter or margarine
1 pound shelled unroasted peanuts
Heat oven to 200ºF. Butter 2 cookie sheets, 15 1/2x12 inches, and keep warm in oven. Mix baking soda, 1 teaspoon water and the vanilla; reserve.
Mix sugar, 1 cup water and the corn syrup in 3-quart saucepan. Cook over medium heat, stirring occasionally, to 240ºF on candy thermometer or until small amount of syrup dropped into very cold water forms a soft ball that flattens when removed from water.
Stir in butter and peanuts. Cook, stirring constantly, to 300ºF or until small amount of mixture dropped into very cold water separates into hard, brittle threads. (Watch carefully so mixture does not burn.) Immediately remove from heat. Quickly stir in baking soda mixture until light and foamy.
Pour half the candy mixture onto each cookie sheet; quickly spread about 1/4 inch thick. Cool completely, at least 1 hour. Break into pieces. Store in covered container.
Makes 6 dozen candies