Food & Cooking Recipes Dessert & Treats Recipes Peanut Butter Swirl Bark 3.6 (152) 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 June 12, 2017 Print Rate It Share Share Tweet Pin Email Prep Time: 15 mins Total Time: 1 hrs 15 mins Yield: Makes one 9-by-12 1/2-inch sheet Smooth peanut butter and two types of chocolate make up this version of the beloved peanut butter cup. Ingredients Vegetable oil cooking spray 12 ounces bittersweet chocolate, chopped 4 ounces milk chocolate, chopped ¼ cup creamy peanut butter Directions Coat a 9-by-12 1/2-inch rimmed baking sheet with cooking spray, and line with parchment, leaving an overhang on ends. Melt bittersweet chocolate in a double boiler or a heatproof bowl set over a pan of simmering water, stirring. Pour into baking sheet, and spread in an even layer. Melt milk chocolate with peanut butter in a double boiler or a heatproof bowl set over a pan of simmering water, stirring. Drizzle chocolate-peanut butter mixture over bittersweet chocolate, and swirl with a skewer. Refrigerate until firm, about 1 hour. Break into pieces. Rate it Print