This is a recipe for rich brownies made with plenty of hazelnuts. It starts with cracking and roasting shelled hazelnuts, then melting chocolate and butter in a double boiler, and adding heavy cream, sugar, eggs, liqueur, cake flour, and cocoa powder to make the batter. Crushed hazelnuts are mixed into the batter, poured into a mold and baked, then topped with more hazelnuts and cut. This is a perfect treat for homemade sweets, entertaining, or as a gift.