In a small bowl, mix eggs until fluffy and smooth.
Add the sugars, vanilla, and cinnamon. Mix really well until completely combined, ensuring there are no lumps of cinnamon stuck to the bottom or sides of the bowl.
Cut the bread into sticks, or leave as whole slices if preferred.
Melt a smidge of butter in a small skillet.
Dip each bread stick into the egg mixture, coating each side well.
Place in the pan and cook on low-medium heat until golden. Repeat until done with each piece of bread.
Plate the French toast, sprinkle with powdered sugar, and coat with maple syrup if using. Serve with any additional desired breakfast foods.