Although they have the same ingredients and toppings, there is one key difference between McDonald's Double Cheeseburger and its wallet-friendly McDouble.
Sometimes referred to as curds and whey, this dairy product differs from cheese in that it’s not aged, but rather sold and served fresh. It's also low in calories, compared with other cheeses.
Well, sorta. The company's own website states that it's processed pasteurized American cheese, which is made from milk, cream, water, sodium citrate, salt, cheese cultures, citric acid ...