Break up your bread into pieces and pop them in your food processor. You are welcome to combine wheat, white, seeded and any other bread products in your homemade bread crumbs. The different flavors and textures will make your homemade breadcrumbs unique and delicious.
Pulse until a fine crumb. If you don't have a food processor a large hole cheese grater will work as well. The food processor makes quick work of the project and the cheese grater will give you a larger crumb to the homemade breadcrumbs.
Spread on a cookie sheet. Line the cookie sheet with a silpat or parchment paper to make your life easier.
Bake at 350 for 15 minutes (depending on how many crumbs are on the pan). Less crumbs, less time.
Stir and pop back in the oven for 5 minutes. Be careful not to burn them. The idea is that you want ALL of the moisture to evaporate from the bread crumbs. If moisture is still in the crumbs when you store them, you run the risk of having mold form in them.