Sesame Toffee Recipe

Line a 15-in. x 10-in. x 1-in. pan with foil and grease the foil with cooking spray; set aside. Grease the sides of a large heavy saucepan with 2 teaspoons butter. Add the corn syrup and remaining butter; cook over medium heat until butter is melted. Add sugar and sesame seeds; cook and stir until mixture comes to a boil. Cook and stir until mixture turns a golden brown and a candy thermometer reads 300 ° (hard-crack stage). Pour into prepared pan (do not scrape sides of saucepan). Spread evenly. Cool; break into pieces.