Preheat oven to 350.
Prepare a large baking dish by coating inside with butter. Evenly arrange panettone cubes in dish.
In a large bowl combine eggs, whipping cream, milk, sugar and cinnamon. Pour over panettone cubes and make sure all panettone is submerged under egg mixture. Let stand for 15 minutes. Bake in oven for 1 hour or until it puffs and center is set. Let cool and serve with fresh raspberries and balsamic reduction drizzled over top.