Sonic Adds Ketchup And Mayo To Cheeseburgers – Now Calling Them ‘New And Improved’
Calling them “New and Improved,” Sonic Cheeseburgers now come served with ketchup and mayo between the buns. As per Sonic: “Sonic Cheeseburgers and SuperSONIC Double Cheeseburgers are new and improved! Bite into 100% pure beef, ..