Makes one cake INGREDIENTS 12 eggs, separated 8 ounces light brown sugar 14 ounces hazelnut flour 4 ounces all-purpose flour Pinch of salt 4 ounces granulated sugar Basic Buttercream, for frosting Chocolate block, for decorating Chopped hazelnuts, for decorating DIRECTIONS Preheat to 350°F. Butter 2 half-sheet pans and line them with parchment. In a metal…