This recipe started from a card from a grocery store, then turned into something indulgent. You can change the cheeses to whatever you want, but after many trials, these cheeses work the best. You can beef up this mac and cheese by adding extra ingredients before baking: -- Add in two cups cooked broccoli cuts and 2 cups cooked diced chicken breast. -- Add in 2 cups cooked crumbled bacon and 1 cup chopped scallions. -- Add in 2 cups diced cooked ham. -- Add 2 cups chopped tomatoes and 1 cup chopped fresh basil.