In a shallow bowl, whisk together the eggs, milk, sugar, vanilla extract, and cinnamon until well combined.

Heat a large skillet or griddle over medium heat and melt 1 tablespoon of butter.

Dip each slice of bread into the egg mixture, allowing it to soak for about 10-15 seconds per side.

Place the soaked bread slices onto the hot skillet and cook for 2-3 minutes on each side, or until golden brown.

Add the remaining butter to the skillet as needed to prevent sticking and to add flavor.

Serve the Pain Perdu warm, topped with maple syrup or a dusting of powdered sugar.