Peanut Brittle

This recipe, adapted from Williams Sonoma, worked very well.

1 1/2 cups sugar
3/4 cup light corn syrup
3 Tbs. water
1 tsp. vanilla extract
3 Tbs. unsalted butter
1 tsp. baking soda
1 1/2 cups salted peanuts

Line a cookie sheet with a Silpat liner.
In a pot over medium-high heat, combine the sugar, corn syrup, water and vanilla. Stir until the mixture starts to boil. Cover and boil for 3 minutes. Uncover and brush the inside of the pan with cold water. Cook until a candy thermometer registers 280ºF, 12 to 15 minutes more.
Remove the pan from the heat and add the butter, stirring until it melts. Return the pan to the heat and cook, stirring occasionally, until a candy thermometer registers 300ºF, 7 to 10 minutes.

Working quickly and carefully, remove the pan from the heat and add the baking soda, stirring constantly until incorporated. Stir in the peanuts. Pour the brittle onto the prepared cookie sheet and spread evenly. Let cool, then break into small pieces. Makes 3 to 4 cups.