Food & Cooking Recipes Dessert & Treats Recipes Cookie Recipes Chocolate Sandwiches 4.0 (7) 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 Yield: 3 dozen The rich, crunchy cookies call out for a glass of milk. Ingredients 1 ¾ cups all-purpose flour, plus more for work surface ¼ cup unsweetened Dutch-process cocoa powder ½ teaspoon baking powder ¼ teaspoon coarse salt ½ cup (1 stick) unsalted butter 1 cup sugar 1 large egg 1 teaspoon pure vanilla extract 12 ounces white chocolate, finely chopped ½ cup heavy cream Directions Sift flour, cocoa powder, baking powder, and salt into a large bowl. Set aside. Put butter and sugar in the bowl of an electric mixer fitted with the paddle attachment; mix on medium speed until creamy. Mix in egg and vanilla. Reduce speed to low. Add flour mixture; mix until just combined. Halve dough, and wrap in plastic. Refrigerate about 1 hour. Preheat oven to 325 degrees. Roll dough on a lightly floured surface to 1/8 inch thick. Cut into 1 inch squares. Space 1 inch apart on baking sheets lined with parchment paper. Refrigerate 30 minutes.Wrap scraps in plastic, and refrigerate 30 minutes; reroll and cut. Bake until edges just begin to brown, about 12 minutes. Cool on sheets on wire racks. Put 9 ounces chocolate in medium bowl. Bring cream to a boil. Pour over chocolate; let stand 5 minutes. Stir until smooth. Chill until spreadable, about 1 hour, stirring occasionally. Spread onto bottom of half the cookies. Sandwich with remaining cookies. Melt remaining chocolate in a small heatproof bowl set over a pan of simmering water. Fill a parchment paper cone, or a small pastry bag fitted with a round tip (such as Ateco #2), with melted chocolate; decorate cookies. Rate it Print