Food & Cooking Recipes Dessert & Treats Recipes Cookie Recipes Hazelnut Thumbprints 3.5 (58) 24 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 June 12, 2017 Print Rate It Share Share Tweet Pin Email Servings: 24 Yield: 2 dozen These crispy, crunchy, nutty delights are perfect for the holidays. Ingredients ½ cup (1 stick) unsalted butter, softened ½ cup plus 2 tablespoons sugar 1 large egg, separated, each part lightly beaten 1 teaspoon pure vanilla extract 1 ¼ cups all-purpose flour ⅛ teaspoon coarse salt ½ cup toasted skinned hazelnuts, ground Strawberry jam, for filling Directions Preheat oven to 325 degrees. Put butter and 1/2 cup sugar in the bowl of an electric mixer fitted with the paddle attachment; mix on medium speed until pale and fluffy, about 3 minutes. Add egg yolk and vanilla, and mix well. Reduce speed to low. Add flour and salt, and mix until just combined. Refrigerate dough for 2 hours. Stir together toasted hazelnuts and remaining 2 tablespoons sugar in a small bowl. Roll dough into 1-inch balls; dip balls in egg white, then in hazelnut-sugar mixture. Space 1 inch apart on baking sheets lined with parchment paper. Press down center of each ball with your thumb. Bake for 10 minutes.Remove from oven; press down centers again with the end of a wooden spoon. Return to oven. Bake cookies until golden brown, 8 to 10 minutes more. Let cool slightly on sheets on wire racks. Fill each center with jam. Cook's Notes To toast the nuts for these cookies, place them on a rimmed baking sheet in an oven heated to 350 degrees for 10 minutes; then transfer them to a clean kitchen towel and rub them until the skins come off. Grind them in a food processor. Rate it Print