Cut each slice of bread into three sticks, set aside.
In a large bowl or pie plate whisk together the eggs, heavy cream and vanilla extract.
Combine the cinnamon sugar mixture on a plate and set aside.
Lightly coat the basket of air fryer with nonstick cooking spray.
Roll the sticks in the egg mixture quickly (you don’t want it to soak in), shake off excess and place in the pan. Cook in multiple batches.
Place French toast sticks in the basket, in a single layer, making sure they do not touch each other. You’ll need to cook them in batches. Set the air fryer to 360° and cook 6 minutes, flip, and cook for an additional 1-3 minutes, watching closely, or until golden brown.
Place butter in a microwave safe bowl and melt.
Remove sticks from the basket, dip in butter then roll in the cinnamon sugar mixture.
Repeat the process with remaining bread.
To keep the cooked French Toast Sticks warm while making another batch simply place them in a single layer on a baking sheet and then put them in a warm oven (175 - 200 degrees F). It will keep them warm and crispy until you are done cooking all of the French toast.
Serve with warm maple syrup, berries and whipped cream if desired.