Preheat oven to 350 degrees F.
Spray and 8x8 pan with cooking spray.
Tear bread into bite sized pieces and place in the pan, filling it up. You may end up using the whole loaf or just a portion of it depending on the size of the loaf.
Melt butter in a microwave safe bowl and drizzle over bread in the pan.
Sprinkle the bread with the dried cranberries.
Add eggs, milk, sugar, vanilla and cinnamon to a medium mixing bowl. Beat together.
Pour the egg mixture over the bread making sure to cover all the bread evenly.
Sprinkle the brown sugar on top.
Bake in a 350 degree oven preheated oven for 45 minutes. If the top gets too browned, you can add some foil to the top for the remainder of the cook time.