Preheat oven to 325 degrees F. Butter and parchment a 9-inch cake pan
In the bowl of a food processor, grind chocolate and hazelnuts down to a fine paste. Add soft butter and sugar and pulse until thoroughly incorporated. Add eggs 1 by 1. Scrape down bowl carefully. Add flour. Fill prepared cake pan with torte batter. Spread carefully to level and bake for 20 to 25 minutes until cake tester comes out clean.
Recipe courtesy of Heather Carlucci