For decades, McDonald’s fries were fried in a mixture of 7 percent cottonseed oil and 93 percent straight beef fat. This is what made them so undeniably delicious, and also gave them more saturated fat per ounce than a McDonald’s hamburger.Click to see full answer. Also know, does McDonald’s use beef fat in fries?At this time McDonald’s in the US did use beef tallow in its fries but replaced it with vegetable oil in the 1990s. It does however use “natural beef flavour” in the oil blend that the fries are cooked in before being frozen and shipped to stores around the nation.Likewise, are McDonald’s fries still made with beef? It turns out that some branches of McDonald’s are serving up fries with a little-known ingredient added to the mix: “natural beef flavoring.” The beefy addition gives the fries an extra kick of flavor, but it means that they aren’t vegan, since the flavoring is actually made from milk. Similarly, it is asked, when did McDonald’s stop frying in beef fat? It became prevalent in McDonald’s fries in 1990, when the company switched from beef tallow to vegetable oil in an attempt to lower the amount of saturated fat in its food.Does McDonald’s use lard in their French fries?While for many years, McDonald’s restaurants cooked the fries in lard or beef fat, as of 1990, that changed. That year, corporate decided that the “side dish” of sorts was fried in vegetable oil, in response to similar menu changes by Burger King and Wendy’s. But there was beef in the fries.