A McDonald’s spokeswoman said: “We are very sorry to hear about this customer’s experience.
“Food safety is of the utmost importance to us and we place great emphasis on quality control, following rigorous standards to avoid any imperfections.
“When the matter was brought to the attention of our staff, we apologised, offered a full refund and asked the customer to return the item so we could further investigate the matter and isolate the affected product.”
McDonald’s new prices: What is McDonald’s new price list?[SPOTLIGHT]
McDonald’s menu hacks: 10 ways to save money on your McDonald’s[INSIGHT]
McDonald’s, Nando’s, KFC and Starbucks slash prices for customers[FOCUS]