Preheat the Air Fryer: Set your air fryer to 370°F (188°C).
Prepare the Egg Mixture: In a large bowl, whisk together 2 eggs, 1/2 cup whole milk, 1 tsp vanilla extract, 1 tbsp brown sugar, and 1/2 tsp cinnamon.
Soak the Bread: Dip each slice of bread in the egg mixture, ensuring both sides are well coated.
Arrange in the Air Fryer: Spray the air fryer basket with cooking spray and place the soaked bread in a single layer, a piece of bread at a time. The basket might not take more than 2 pieces at a time, so cook in batches.
Cook the French Toast: Air fry for 8-10 minutes, flipping halfway through, until golden brown and crispy.
Serve Immediately: Top with maple syrup, fresh fruit, or a dusting of powdered sugar.