Slice bread crosswise so that each slice is about 1-inch thick. Cut larger slices into halves or thirds, if desired. Set aside.

In a mixing bowl, whisk together eggs, chocolate milk, vanilla, cocoa powder and sugar until well blended.

Quickly dip bread slices into the mixture (do not soak) and remove.

Melt butter over medium heat. Cook dipped bread slices in a skillet over medium heat until browned on each side.

Sprinkle with powdered sugar and serve.