ALBAWABA - McDonald’s USA is introducing a series of changes to improve its signature burgers, the company said in a statement. McDonald's is improving its hamburger, cheeseburger, double cheeseburger, McDouble burger and Big Mac, the company said Monday. https://t.co/61rp8ZmwgS — USA TODAY (@USATODAY) April 17, 2023 The move is in line with the firm's effort to upgrade its core items to boost sales, CNN reported." "Buns will be softer. Cheese ...