In a bowl, whisk together the eggs, milk, vanilla extract, salt, and sugar until smooth.
Place the crushed corn flakes on a plate or shallow dish.
Heat a non-stick skillet over medium heat and add butter until melted.
Dip each bread slice into the egg mixture, ensuring both sides are fully coated.
Press each soaked slice into the crushed corn flakes, coating evenly.
Place the coated bread slices in the skillet, cooking each side until golden brown, about 2-3 minutes per side.
Repeat with remaining slices, adding more butter to the skillet if necessary.