Food & Cooking Recipes Dessert & Treats Recipes Orange Mascarpone Filling 3.6 (25) Close Credit: Sang An Yield: 1 12-inch log Use this to make our Orange-Walnut Buche de Noel. Directions In the bowl of an electric mixer fitted with the paddle attachment, beat all ingredients except heavy cream, until smooth. Gently fold in whipped cream. Use immediately, or refrigerate, covered, up to 3 days. Cook's Notes If you're refrigerating the filling, bring it to room temperature and beat until smooth with the paddle attachment before using.