In a large mixing bowl, whisk together the eggs, whole milk, vanilla extract, ground cinnamon, and a pinch of salt. Set aside.
In a shallow dish, crush the cornflakes into smaller pieces for coating.
Dip each slice of brioche or challah bread into the egg mixture, soaking briefly on each side.
Press the soaked bread into the crushed cornflakes to coat both sides.
Melt butter in a frying pan over medium heat. Cook the coated bread slices for about 3-4 minutes on each side until golden brown.
Transfer to a serving platter, drizzle with maple syrup, dust with powdered sugar, and top with fresh berries. Enjoy!