In a shallow dish or bowl, whisk together the eggs, milk, vanilla extract, and ground cinnamon (if using) until well combined. This will be your French toast batter.

Heat a non-stick skillet or griddle over medium heat and add a small amount of butter or oil to grease the surface.

Dip each slice of bread into the egg mixture, ensuring that both sides are evenly coated. Allow any excess batter to drip off.

Place the dipped bread slices onto the preheated skillet or griddle, cooking them in batches if necessary to avoid overcrowding the pan.

Cook the French toast for 2-3 minutes on each side, or until golden brown and cooked through. Use a spatula to flip the slices carefully.

Once cooked to your liking, transfer the French toast to a plate and keep warm while you cook the remaining slices.

Serve the French toast warm with your favorite toppings, such as maple syrup, powdered sugar, fresh fruit, or whipped cream.

Enjoy your classic French toast as a delicious and satisfying breakfast or brunch option!