Mix egg, protein powder, cinnamon, and almond milk in a bowl.
Mix well to break up the protein powder.
Pour mixture into a plate or pie pan. Let each slice of bread soak for about a minute. Flip bread to soak up most of the remaining protein mixture.
Place soaked slices into a hot skillet that is coated with a little bit of butter so they don't stick.
Pour the remaining protein mixture over the frying french toast and puncture the toast with a fork so it can absorb the remaining protein mixture.
After frying for a couple minutes, flip toast and fry the other side.
Serve with your syrup, jam, or fruit of your choice.
Notes
You can multiply the quantities of these ingredients depending on the number of servings needed. However, if you are trying to stick with a specific amount of protein, it is best to mix one serving at a time so you can incorporate the proper amount of protein in your two slices of bread while they are frying.