Use high quality butter and Parmesan cheese. My brands of choice are Land O' Lakes butter and BelGioioso Parmesan cheese. Be sure to grate the cheese from a block instead of using a bag of shredded cheese. The flavor and consistency is much better.
Egg noodles, fettuccine, or pappardelle work well for this recipe, (I used pappardelle).
Add 1-2 bouillon cubes to the boiling pasta water to add even more flavor to the noodles.