1. Prepare the egg mixture: In a shallow dish or pie plate, whisk together the eggs, milk, vanilla protein powder, vanilla extract, cinnamon, and a pinch of salt until thoroughly combined and smooth. Make sure there are no lumps from the protein powder.

2. Soak the bread: Dip each slice of bread into the egg mixture, allowing it to soak for about 15-20 seconds per side. The bread should be fully coated but not oversaturated, which could make it soggy.

3. Heat the pan: Place a large non-stick skillet or griddle over medium heat. Add 1 tablespoon of butter or spray generously with cooking spray. Allow the butter to melt and coat the pan, or ensure the cooking spray is evenly distributed.

4. Cook the French toast: Once the pan is hot, carefully place the soaked bread slices onto the skillet. Avoid overcrowding the pan; cook in batches if necessary.

5. Achieve golden perfection: Cook for 3-4 minutes per side, or until each side is beautifully golden brown and cooked through. The internal temperature should be warm, and the egg mixture should no longer be wet.

6. Serve immediately or prepare for meal prep: Transfer the cooked French toast to a plate and serve warm with your favorite toppings, or allow it to cool completely on a wire rack if you are preparing it for later.