1 loaf French bread, cut or torn into 1/2 inch cubes (about 12 cups of bread)
2 1/2 cups milk
6 large eggs
1/2 cup granulated sugar
1 tablespoon vanilla extract
1 teaspoon ground cinnamon

For the Cinnamon Streusel Topping:

1/4 cup cold butter
1/4 cup light brown sugar
1/4 cup all-purpose Gold Medal flour
1/8 teaspoon ground cinnamon
Pinch of salt

Butter and Maple Syrup, for serving, optional