Spread peanut butter on 2 slices of bread and the jelly on the other 2 slices of bread to make 2 sammies.
Scramble the eggs, milk and vanilla in a bowl to make french toast batter.
Place a large, nonstick skillet over medium heat, add butter. When the butter is almost melted, dunk two of the sammies into the batter and let the excess drip off. Place in the pan and cook until golden brown on each side, about 3-4 minutes per side.
Cut into sticks and serve with warm maple syrup.