McDonald's is spending $100 million to bring back customers after an E. coli outbreak infected onion supplies in certain states. So far, 104 cases have been reported, the FDA says.

McDonald's is investing $100 million to bring customers back to stores after an outbreak of E. coli food poisoning tied to onions on the fast-food giant's Quarter Pounder hamburgers.

McDonald’s is investing $100 million to bring customers back to stores after an outbreak of E. coli food poisoning tied to onions on the fast-food giant’s Quarter Pounder hamburgers.

Of that, $65 million will go to the McDonald’s franchises hit the hardest. McDonald’s is investing $100 million to bring customers back to stores after an outbreak of E. coli food poisoning tied to onions on the fast-food giant’s Quarter Pounder hamburgers.

McDonald’s announced this weekend that it’s going to spend $100 million to try and get people back to the Golden Arches after losing sales thanks to that E. coli outbreak. FOX31's Nate Belt spoke to a professor of economics about how this could impact the fast food giant.

This week, the company completed the return of Quarter Pounder burgers, with slivered onions, to all restaurant menus nationwide.

The fast-food giant is making a big splash to show consumers their recent E. coli outbreak was just a flash in the pan.