Centerpiece Napoleon With Chocolate Hazelnut Mousse Recipes

Steps:

• Make hazelnut crème:
• Melt chocolate with Nutella and keep warm.
• Beat cream with an electric mixer until it just holds soft peaks, then chill.
• Beat egg and yolks in cleaned mixer bowl with cleaned beaters at high speed until thick and pale, about 5 minutes.
• Meanwhile, bring sugar, water, and corn syrup to a boil in a 1-qt heavy saucepan over medium heat, stirring occasionally until sugar has dissolved. Continue to boil, undisturbed, until candy thermometer registers 238°F (soft-ball stage; you will need to tilt pan to get temperature), about 4 minutes.
• Reduce mixer speed to medium and add hot sugar mixture to eggs in a slow steam (try to avoid beaters and side of bowl), then beat until mixture is pale, thick, tripled in volume, and completely cool, about 5 minutes.
• Fold chocolate mixture into egg mixture. Fold in one third of whipped cream to lighten, then fold in remaining whipped cream gently but thoroughly. Chill at least 4 hours.
• Candy hazelnuts:
• Line a baking pan with foil (shiny side up).
• Heat sugar in a heavy 10-inch skillet over medium heat, stirring with a fork to heat sugar evenly, until it starts to melt, then stop stirring and cook, swirling skillet occasionally so sugar melts evenly, until it is dark amber. Add hazelnuts, stirring until coated. Transfer to foil and cool completely, then coarsely chop.
• Bake pastry:
• Preheat oven to 400°F with rack in middle. Line a large heavy baking sheet with parchment paper.
• Roll out puff pastry onto a lightly floured surface with a lightly floured rolling pin into a 17- by 10-inch rectangle (about 1/8 inch thick). Transfer to baking sheet, then cover with a sheet of parchment and top with a heavy baking sheet or sheet pan to weight down. Bake until pale golden, 15 to 20 minutes.
• Meanwhile, stir together corn syrup and water.
• Remove top baking sheet and parchment. Generously brush pastry with corn syrup mixture and cover with parchment, then invert pastry and brush other side with corn syrup mixture. Replace parchment and baking sheet and bake until deep golden and crisp, 15 to 20 minutes more. Cool completely.
• Using a serrated knife, trim edges of pastry, then halve lengthwise and cut each half into 8 equal rectangles for a total of 16 rectangles.
• Assemble dessert:
• Arrange 8 rectangles on a baking sheet and dust with confectioners' sugar to cover. (To mark pastry decoratively, see cooks' note, below.)
• Dab a small amount of hazelnut crème in center of 8 plates, then put an undecorated pastry rectangle on top. Divide remaining hazelnut crème among pastry rectangles. Sprinkle with some of the candied hazelnuts and top with decorated pastry rectangles. Sprinkle with more candied hazelnuts.
• Do Ahead
• Hazelnut crème can be chilled up to 2 days. Candied hazelnuts keep in an airtight container 3 weeks. Pastry can be baked 2 days ahead and kept in an airtight container at room temperature.

Steps:

• Please consider a few things before you begin this project. First, not every balloon works. They don't always release. If you can find the strong punching bag type balloon, choose that one. Some people are allergic to latex so be aware that most balloons are made from latex. Inflate the balloon. Secure it closed with a ribbon (you will need to untie this later). Dip the bottom of the balloon in the dark chocolate. This will create a base. Set the wet chocolate onto a parchment paper-lined surface. Make sure it stands straight. Let the chocolate set until firm. Place dark chocolate in a cornet. The next step will be easier if you have an assistant. Have the assistant hold the balloon horizontally in front of you while you pipe chocolate lines from top to bottom all the way around the surface. When complete, drizzle more lines diagonally across the existing lines. Apply a bit more chocolate near the top opening and near the bottom to provide extra support. This will form a bird cage effect. Let the chocolate set. When the chocolate begins to harden, release a little bit of the air from the balloon, but just enough so the balloon retracts slightly (about 1/8-inch from the outside). Carefully set the chocolate covered balloon aside. Depending on your room temperature, it will take a good 10 minutes to set. To make the balloon flowers, inflate 10 small balloons and close them with ribbons. Your presentation will be more interesting if you inflate them to different degrees to make different sized flowers. Dip each balloon anywhere from 1 to 3 times to create a different number of petals on each. To accomplish this, dip the balloon once, spin it slightly, dip it again, etc. Set each dipped balloon on a parchment-lined sheet pan and allow the chocolate to set. When set, pop the balloon and remove the deflated balloon from the flower. Use cocoa butter paints to decorate the insides of the flowers. Let the paint set. If you made different sizes, you can layer the balloon flowers by setting one inside another. Use chocolate to "glue" them together. Slowly deflate the large balloon that is inside the large chocolate cage by untying its ribbon. Carefully pull the deflated balloon through the hole at the top. Use tempered chocolate to "glue" the chocolate flowers onto the large cage. Reserve one to cover the hole at the top. Your guests will certainly be fascinated by your creation.
• From Dessert Circus, Extraordinary Desserts You Can Make at Home, by Jacques Torres
• How to Temper Chocolate:
• Chocolate is tempered so that after it has been melted, it retains its gloss and hardens again without becoming chalky and white (that happens when the molecules of fat separate and form on top of the chocolate). There are a variety of ways to temper. One of the easiest ways to temper chocolate is to chop it into small pieces and then place it in the microwave for 30 seconds at a time on high power until most of the chocolate is melted. Be very careful not to overheat it. (The temperature of dark chocolate should be between 88 and 90 degrees F, slightly warmer than your bottom lip. It will retain its shape even when mostly melted. White and milk chocolates melt at a temperature approximately 2 degrees F less because of the amount of lactose they contain.) Any remaining lumps will melt in the chocolate's residual heat. Use an immersion blender or whisk to break up the lumps. Usually, chocolate begins to set, or crystallize, along the side of the bowl. As it sets, mix those crystals into the melted chocolate to temper it. A glass bowl retains heat well and keeps the chocolate tempered longer. Another way to temper chocolate is called seeding. In this method, add small pieces of unmelted chocolate to melted chocolate. The amount of unmelted chocolate to be added depends on the temperature of the melted chocolate, but is usually 1/4 of the total amount. It is easiest to use an immersion blender for this, or a whisk. The classic way to temper chocolate is called tabliering. Two thirds of the melted chocolate is poured onto a marble or another cold work surface. The chocolate is spread out and worked with a spatula until its temperature is approximately 81 degrees F. At this stage, it is thick and begins to set. This tempered chocolate is then added to the remaining non-tempered chocolate and mixed thoroughly until the mass has a completely uniform temperature. If the temperature is still too high, part of the chocolate is worked further on the cold surface until the correct temperature is reached. This is a lot of work, requires a lot of room, and makes a big mess. A simple method of checking tempering, is to apply a small quantity of chocolate to a piece of paper or to the point of a knife. If the chocolate has been correctly tempered, it will harden evenly and show a good gloss within a few minutes.

Steps:

• Arrange a rack in the middle of the oven and preheat to 350°F. Arrange the hazelnuts in a single layer on a baking sheet and toast until golden, 10 to 12 minutes. Lay a tea towel out flat and transfer the hot toasted nuts onto it. Fold the edges of the towel over to cover the nuts and gently roll them to loosen the skins. Reserve about 1/4 cup nuts for the garnish and transfer the rest to the bowl of a food processor. Process the nuts, scraping the sides down, until a smooth paste forms, about 2 minutes.
• In a large bowl, mix the cream cheese with a wooden spoon or rubber spatula until smooth. Add the liqueur and chocolate and set aside.
• In a medium bowl, whisk together the eggs. In a medium pot over moderate heat, combine the nut paste, the milk, and sugar. Warm to just below the boiling point, then slowly whisk a few splashes of the hot milk into the beaten eggs. Add the warmed egg mixture to the pot and return to moderately low heat. Stir constantly, until it thickens and holds a slight ribbon when stirred, about 2 minutes.
• Pour the hot egg-milk mixture into the bowl with the chocolate mixture and whisk until smooth. Nest the bowl in an ice water bath and stir until cool but still easy to stir, 5 to 8 minutes. (Or, chill the mixture in the refrigerator, stirring occasionally, until cool, about 45 minutes.)
• Using a large wire whisk or an electric mixer, whip the cream until it holds distinct peaks. Fold about one-third of the cream into the chocolate mixture to lighten it, then gently fold in the remaining two-thirds until just incorporated. Transfer the mousse to individual dishes or 1 large serving dish and chill, loosely covered, at least 1 hour. Before serving, roughly chop the reserved 1/4 cup toasted hazelnuts and use them to garnish each portion.
• The MOUSSE can be prepared and refrigerated, loosely covered, up to 1 day ahead.