Whisk together the egg, milk, vanilla, and cinnamon in a medium mixing dish. put aside.
Set up an assembly line by placing the whisked egg mixture and bread close to each other.
Spray nonstick oil spray on the air fryer basket.
Dip the bread slices into the egg mixture, making careful to cover both sides. Remove from the mixture and let aside for a few seconds before placing in the air fryer basket. Repeat with the remaining slices.
Turn off the Air Fryer. Preheat the oven to 400°F and bake for 5 minutes. After 5 minutes, carefully remove the basket and turn the french toast pieces. Close the air fryer and continue to cook for 3-4 minutes at 400 degrees. *Time may vary significantly based on the model of air fryer.
When the french toast is done, remove it from the pan and cook the remaining french toast slices.
Serve with warm maple syrup and powdered sugar, or any toppings you choose!
NOTES
Don't soak the bread too long. Brioche has a soft texture and will quickly absorb the custard liquid. If you soak it for too long, it will begin to come apart.
Line the basket of your air fryer with parchment paper. If your bread is a touch mushy, line the basket with parchment to keep the moisture from pooling in the bottom. The air fryer seen here did not require parchment paper. Some of the comments below mentioned sticking with the parchment paper, so you may also spray the paper with cooking spray for further assurance.
Warm up your air fryer. If you do not preheat your air fryer, the French toast sticks may not cook uniformly and the middles may remain raw. If your air fryer does not have a preheat option, set it to 375°F for 5 minutes before adding the bread.
Use a different type of bread. We adore the richness and sweetness of brioche, but you may use other sliced pieces of bread in this recipe. If using a substantial bread, such as sourdough, soak it in the egg mixture for a bit longer.