"Everyone knows that toasted bread crumbs on mac 'n' cheese are great, but here's a trick you maybe haven't tried: Bake the bread crumbs separately from the mac 'n' cheese (just enough to get them nice and toasty). Then you can sprinkle it on top of the noodles. You get more coverage on your mac 'n' cheese and the bread crumbs achieve peak crispiness."