Although crouton is a French word, it might have its roots in an English culinary tradition of serving soup in bread crusts, according to the Food Timeline website. While the French word refers to usage of the crust of a loaf of bread, the preparation of modern croutons with the entire slice of bread or just the crust is a matter of personal preference. Using sliced wheat bread to make your croutons is an option that adds nutrition, texture and interest to a variety of dishes, from salads and soup to gratins.