Food & Cooking Recipes Dessert & Treats Recipes Hazelnut Filling 3.1 (66) 13 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 January 9, 2019 Print Rate It Share Share Tweet Pin Email Photo: Dana Gallagher Yield: 8 cups Make this for our Darkest Chocolate Crepe Cake. Ingredients ⅔ cup heavy cream 6 large egg whites 1 ⅔ cups sugar 1 ¾ cups (3 ½ sticks) unsalted butter, cut into pieces, softened 1 teaspoon pure vanilla extract ⅓ cup hazelnut cream Pinch of salt Directions Put cream into the bowl of an electric mixer fitted with the whisk attachment; beat on medium-high speed until soft peaks form, about 4 minutes. Transfer to a medium bowl. Refrigerate 1 hour. Whisk egg whites and sugar in the clean bowl of mixer set over a pan of simmering water until sugar has dissolved and mixture registers 160 degrees, 2 to 3 minutes. Attach bowl to mixer fitted with the clean whisk attachment; beat on high speed until slightly cooled and stiff (but not dry) peaks form, about 5 minutes. Fit mixer with paddle attachment. With mixer on medium-low speed, add butter, several pieces at a time, mixing well after each addition (meringue will deflate slightly as butter is added). Add vanilla, hazelnut cream, and salt; mix until mixture comes together, 3 to 5 minutes. Fold in whipped cream with a rubber spatula. Use immediately. Rate it Print