The way my mother makes croutons once at year at least for her famed and fabulous turkey stuffing is to toast them in a little melted butter in a wide shallow pan on the stove top. Its best to use day old French or Italian loaf bread, but you can dry out the cubed bread in a warm oven for a few minutes if you are working with fresh bread. Butter is for the flavor. It cant be beat. You dont need anything else actually. Just butter. If you are working with butter and some good bread, the flavor is just perfect.