25min · 8 servings Ingredients • All-purpose flour, for dusting work surface • 1 (17.3-oz.) package frozen puff pastry (2 sheets), thawed • 1/3 cup Nutella or jam • 1 large egg beaten with 1 Tablespoon water • Crystal sanding sugar, for topping (optional) • Confectioners' sugar, for dusting All you need is four simple ingredients for this easy but impressive treat that’s filled with chocolate hazelnut spread (or jam!) and dusted with a snowy shower of powdered sugar.