McDonald’s has begun using fresh beef in its popular burgers, in one of the biggest changes to its infrastructure since the chain opened. The 76-year-old fast food giant has previously always used frozen beef to make its meals, but is currently trialling the use of fresh produce in its restaurants in the US.The fresh beef strategy is being tested at nearly 100 restaurants across the states of Texas and Oklahoma, and will initially only apply to the chain’s Quarter Pounder and Clubhouse burgers. McDonald’s franchisees have expressed “major concerns” regarding food safety and fears the chain will no longer be able to serve a large amount of customers quickly if fresh beef is served. McDonalds has also just launched a Nutella burger - but you'll have to travel to Italy to get your hands on one.