Food & Cooking Recipes Dessert & Treats Recipes Cookie Recipes Mocha Shortbread 3.1 (23) 2 Reviews 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 5, 2021 Print Rate It Share Share Tweet Pin Email Prep Time: 30 mins Total Time: 2 hrs 15 mins Yield: 4 dozen Bake these mocha shortbread cookies 30 minutes for a softer texture, or 35 minutes for a more traditional crumbly texture. Ingredients 2 cups all-purpose flour ¼ cup unsweetened cocoa powder ½ teaspoon coarse salt 2 sticks unsalted butter, room temperature 1 cup sugar 2 teaspoons pure vanilla extract 1 tablespoon instant espresso powder ½ cup cacao nibs Directions Whisk together flour, cocoa powder, and salt in a bowl. In another bowl, beat butter with a mixer on medium speed until fluffy, about 5 minutes. Gradually add sugar, beating until mixture is very light, about 2 minutes. Stir vanilla and espresso powder together in a small bowl; add to butter mixture. Scrape down sides of bowl and beat until combined and smooth, about 1 minute. Add flour mixture and beat on low speed until dough just comes together, about 1 minute. Beat in cacao nibs. Press dough evenly into a 9-by-13-inch baking pan lined with parchment. Cover with plastic wrap and smooth top with hands or the bottom of a dry measuring cup. Refrigerate until firm, at least 1 hour and up to 1 day. Preheat oven to 350 degrees. Use a paring knife to cut dough into 48 bars, 8 across short side and 6 down long side. Use a fork or skewer to poke holes in top of each bar. Bake until set, 30 to 35 minutes. Let cool in pan on a wire rack 10 minutes, then recut bars. Let cool completely in pan before serving. Bars can be stored at room temperature up to 3 weeks. Rate it Print