Grease a 9x13 baking dish. Combine the butter and brown sugar (1 cup), in a pan over medium heat, stirring until sugar is dissolved. Pour into the baking dish, and spread across bottom evenly. Sprinkle the bite sized pieces of bread across top of butter sugar mixture. In a medium sized bowl whisk the milk, eggs and vanilla. Pour the mixture over the bread, and then toss bread pieces until evenly well coated. Sprinkle the 1 T cinnamon and 2 T brown sugar on top. Cover with cling wrap, and place in fridge overnight.
When ready to bake, preheat oven to 450. Remove cling wrap. Bake for about 30 minutes until golden brown. Is great alone or with powdered sugar and maple syrup.