Cut slices of bread into four sticks per slice and set aside.
In a large bowl, whisk the eggs, half and half, cinnamon, sugar, and vanilla.
Heat a large frying pan or griddle over medium heat and add 3 T. butter.
Quickly dip each “stick” of bread into the egg custard mixture and drop several onto the preheated frying pan / griddle (don’t over-crowd the pan).
Flip sticks until all sides are evenly browned, then transfer to a serving platter.
Continue dipping and cooking sticks until all your bread / egg mixture is used up.
erve immediately with maple syrup, powdered sugar, or another dipping sauce.