Yes, you can put too much cheese in mac and cheese. While cheese is a key ingredient in macaroni and cheese, adding an excessive amount can lead to a dish that is overwhelmingly cheesy, overly rich, and potentially difficult to eat. When you use too much cheese, it can overshadow the flavors of other ingredients, and the dish may become greasy or clumpy. It's essential to strike a balance to achieve the desired creaminess, flavor, and texture without overwhelming the dish.