Fill a shallow bowl about 3/4 full with milk (about 1 cup or 240 ml).

Add the eggs and sugar, then whisk together.

Cut a slice of brioche about 1 1/2 inches (4 cm) thick, then quickly dip it in the milk mixture (do not let it soak too long).

Melt butter in a skillet and brown the slice for 1 minute on each side over low heat.