In a shallow bowl, whisk together the eggs, milk, vanilla extract, cinnamon, and salt until well combined.
Preheat a large skillet or griddle over medium heat and add 1 tablespoon of butter, allowing it to melt and coat the surface.
Dip each slice of bread into the egg mixture, ensuring both sides are coated. Let any excess drip off.
Press each coated slice into the crushed cornflakes, ensuring an even layer sticks to both sides.
Place the coated bread slices onto the hot skillet or griddle. Cook for about 3-4 minutes on each side, or until golden brown and crispy. Add more butter as needed for cooking.
Once cooked, remove from the skillet and serve immediately with maple syrup and a dusting of powdered sugar, if desired.