For ease and simplicity, I buy my croutons. I like oversize or larger seasoned croutons but it's up to you. However, there are tons of recipes online for how to make your own croutons. It's really as easy as toasting some bread in the oven like I do to start my famous Classic Traditional Thanksgiving Stuffing recipe. Another option is to make your own Tortilla Strips like I use in Chicken Tortilla Soup.