Customers in six states will soon be able to design their own burgers, including chicken sandwiches.
Mike Blake / Reuters
With sales at its U.S. outlets falling by more than double than what was expected in November, McDonald's is seeking new ways to innovate and stop the flow of customers to other fast food restaurants, expanding a customization option that allows patrons to build their own burgers.
McDonald's announced Monday that sales in its U.S. stores were down 4.6% for the month, with global comparable sales also falling 2.2%. Analysts had predicted just a 1.9% drop in the chain's American stores, according to the Wall Street Journal .
The company blamed falling sales on "strong competitive activity."