Please note that I shredded my Parmesan and cheddar with a microblade grater which resulted in very finely shredded cheese. If you compared 4 cups of finely shredded to four cups of packaged shredded cheese or cheese shredded with a box grater, they might not be equal. So if you use packaged cheese or grate with a box grater, you might want to add two cups of sharp cheddar first, and then decide if you need more.