Ingredients

3/4 cup sugar 

6 tablespoons light corn syrup 

6 tablespoons water 

3/4 cup salted pistachios 

1 tablespoon unsalted butter 

3/4 teaspoon pure vanilla extract 

1/4 teaspoon baking soda 

Vegetable-oil cooking spray 

Preparation

Spray a baking sheet with vegetable-oil cooking spray, wiping off any excess with a paper towel; set aside. In a medium heavy-bottomed saucepan, combine sugar, corn syrup, and water. Stir to combine. Cover, and bring to a boil over high heat. Cook until sugar is dissolved. Uncover, reduce heat to medium, and continue to cook without stirring until the sugar mixture reaches 295 degrees.on a candy thermometer. Remove from heat.

Stir in 3/4 cup pistachios, the butter, vanilla, and baking soda. Return to heat, and cook, stirring constantly, until the mixture reaches 300 degrees.on a candy thermometer. Remove from heat, and pour mixture onto prepared baking sheet. Working quickly, spread mixture. Set aside to cool.

Break brittle into small pieces. Place in a food processor fitted with a metal blade. Process until powdery.