White bread is always used to make panko bread crumbs. I used ciabatta bread to make it, but, you can also use Italian or french bread. The key is to make sure the bread is stale so that it grinds up easily. Sadly, fresh bread doesn’t grind into powder texture. For regular breadcrumbs, you can use any bread you have lying around. I find that whole wheat bread makes for really finely textured bread crumbs.