Prepare Chocolate Torte. While the Chocolate Torte is baking, prepare the Hazelnut Praline.
After the Chocolate Torte is baked and cooled, prepare Chocolate Ganache.
Carefully remove the cooled Chocolate Torte from the springform pan and place on a wire rack.
Spread the prepared Hazelnut Praline over the top of the torte, mounding in the center.
Pour the Chocolate Ganache over the top and sides of the torte to create a smooth, shiny surface. Spread and smooth out with a spatula, if necessary. Let stand until the ganache is slightly set.
Sprinkle some chopped hazelnuts over the top of the cake.
Carefully remove the cake to a serving plate. Refrigerate until ready to serve.
Preheat oven to 325 degrees F. Generously grease and flour a 9-inch Springform Pans.
In a saucepan over low heat, melt the butter and chocolate; set aside.
In the bowl of your electric mixer, beat the egg yolks and 3/4 cup sugar until mixture is thick and pale yellow. Add the melted butter/chocolate mixture and beat well until combined; set aside.
In a clean bowl with clean beaters, beat the egg whites until they are foamy. Slowly add the remaining 3/4 cup of sugar while continuing to beat until the egg whites are shiny and stiff peaks have formed. Gently fold the beaten egg whites into the chocolate mixture. Fold in the flour and ground hazelnuts to thoroughly combine into the batter. Pour the batter into the prepared springform pan.
Bake for approximately 60 to 70 minutes or until the torte is set on the outside, but slightly undercooked in the center. The Chocolate Torte should be moist and brownie-like, so do not overcook. Remove from oven and let cool in the pan on a wire rack.
In a large bowl, cream butter and sugar until pale and fluffy. Add vanilla extract, ground hazelnuts, and brandy; beat thoroughly until well mixed.
In a double boiler over medium heat, heat the whipping cream, butter, and espresso coffee until the butter is melted. Add the semisweet and bittersweet chocolate and stir until the chocolate is smooth and shiny. Remove from heat and let cool slightly before using.
Oregon Chocolate Hazelnut Torte Recipe: https://whatscookingamerica.net/cake/papahydnhazeltorte.htm