Step 1: Prepare the egg mixture
Crack the egg into a shallow bowl.
Add a dash of vanilla extract and lightly beat with a fork until the egg and vanilla are evenly combined.
Set the bowl aside while you prepare the sandwich.
Step 2: Spread the peanut butter
Place the two slices of bread on a clean cutting board or plate.
Spread 1 tablespoon of creamy peanut butter evenly over one side of each slice.
Try to spread the peanut butter close to the edges so the filling is distributed throughout the sandwich.
Step 3: Add the banana
Arrange the sliced banana evenly over the peanut butter on one slice of bread.
Place the second slice of bread on top, with the peanut butter side facing downward.
Gently press the sandwich together to help the filling stay in place.
Step 4: Heat the skillet
Place a large nonstick skillet over medium heat.
Add the butter and allow it to melt, swirling the pan gently so the bottom is evenly coated.
Keep the heat moderate to prevent the butter from burning before the bread has time to cook.
Step 5: Dip the sandwich
Carefully place the prepared sandwich into the egg mixture.
Turn it over to coat both sides evenly.
Allow the bread to absorb a little of the egg mixture, but avoid soaking it for too long, especially if you are using soft sandwich bread.
Step 6: Cook the first side
Transfer the coated sandwich to the heated skillet.
Cook for approximately 2–3 minutes, or until the bottom becomes beautifully golden brown.
Use a spatula to gently lift one edge and check the color before flipping.
Step 7: Flip and finish cooking
Carefully turn the sandwich over using a wide spatula.
Continue cooking for approximately 2 minutes, or until the second side is golden brown and the egg coating is fully cooked.
The peanut butter should become warm and creamy, while the banana slices soften slightly inside the sandwich.
Your Peanut Butter and Banana French Toast is ready when both sides are golden and the filling is warmed through.
Step 8: Serve warm
Transfer the French toast to a serving plate.
Allow it to rest for about 1 minute before slicing, as the peanut butter filling may be very hot.
Cut the sandwich diagonally into two triangles if desired.
Serve immediately while the bread is warm and the peanut butter is creamy.