Food & Cooking Recipes Dessert & Treats Recipes Hazelnut Brittle 3.8 (9) Add your rating & review By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on May 16, 2017 Print Rate It Share Share Tweet Pin Email Yield: 1 11-by-17-inch sheet You can also make this caramel brittle with other nuts, such as slivered almonds or pistachios. Ingredients Vegetable oil, for pan and knife 4 cups sugar ¼ teaspoon apple-cider vinegar 5 ½ cups hazelnuts Directions Combine sugar, vinegar, and 1 cup water in a medium saucepan set over medium heat until sugar dissolves. Cook until dark amber in color, 20 to 22 minutes. Stir in nuts. Oil an 11-by-17-inch baking pan. Pour hot mixture onto pan. Let set until firm but still soft enough to cut. Invert onto a cutting board, and unmold. Working quickly, use an oiled chef's knife to cut the sheet into six rectangles. Store brittle in an airtight container up to 1 week. Cook's Notes When making caramel for brittle, always use a heavy-bottomed pan to evenly distribute heat. When caramelizing sugar and water, reduce the heat after the syrup boils, and gently swirl the pan to check the color. To prevent crystallization, brush down the sides of the pan with a pastry brush dipped in water; covering the pan for a few minutes also prevents crystallization, for any condensation will become trapped and run down the sides. To stop the cooking process, dip the pan in a bowl of ice water for a few seconds. For easier cleanup, place utensils in the pan, fill with water, and bring to a boil until sugar has dissolved. Rate it Print