Lightly coat the bottom and side of the crock pot insert with cooking spray. Place the cubes of bread evenly into the bottom of the pot.
In a small bowl, combine the eggs, milk, sugar, vanilla and cinnamon. Whisk until well combined. Pour the egg mixture over the cubed bread and toss to coat. Cover and refrigerate overnight.
Sprinkle the chocolate chips evenly over the top. Cook on low for 4 hours.
French toast was quite dry but delicious. Could use more egg mixture.