Whip egg, milk, vanilla extract, and cinnamon together until combined.
3 large eggs, ¼ cup milk, half and half, or cream, 1 teaspoon vanilla extract, ½ teaspoon cinnamon
Crush Cap'n Crunch and put it in a separate bowl.
1 ½ cups Captain Crunch cereal, crushed
Dip one slice of bread at a time, first into the egg mixture, and then into the cereal. Make sure it is coated well.
4 slices of fresh brioche
Transfer coated brioche to a frying pan over medium heat with butter. Start with 2 tablespoons of butter and add more as needed. The pan should always be buttery to get your outer layer crispy.
4 tablespoons unsalted butter
Flip after about 2 minutes and repeat for all 4 slices of bread. Keep warm in the oven at 200°F until ready to serve.