In a dish with walls or a bowl (I use a casserole dish), add your eggs, milk, and vanilla, Whisk together with a whisk or fork.
On a plate, combine your cinnamon and sugar and mix together until combined.
Quickly dip each slice of toast in the egg mixture on the front and back (don't let soak). Either dip the slice in the cinnamon sugar mixture or sprinkle on the front and back.
Place each slice onto the air fryer tray in a single layer, leaving room between each slice for air flow. (You will most likely have to do these in 2-3 batches, depending on the size of your air fryer)
Set your air fryer to 350 degrees F and fry for 6-8 minutes.
Serve with maple syrup, sprinkled with powdered sugar, or just as is.
Notes
Just lightly dip the toast in the egg/milk mixture. Don't let it soak, or it will get soggy.
For a crunchy cinnamon sugar coating, dip each side in the cinnamon sugar mixture. For a less sweet option, sprinkle the cinnamon sugar mixture on both sides instead of dipping.
I did not use parchment paper to line my basket, but if your air fryer is prone to sticking, use a parchment paper liner in your air fryer or spray with a bit of air fryer-safe oil.
Place the toast in your air fryer in a single layer and leave room between each slice of toast. Make sure that air can circulate around each slice so it gets perfectly cooked. Don't crowd your air fryer! This may mean you have to do several batches. (I did two batches).
This recipe is so easy to double (or triple, or quadruple), if you want to make more and refrigerate or freeze for later. If freezing, store in a freezer-safe container. To reheat, simply pop back into the air fryer for a few minutes.
All air fryers cook differently, always check frequently to make sure your french toast sticks cook properly.