There's no such thing as a free lunch, but two quarters for a cheeseburger is pretty close.

McDonald's is offering a 50-cent Double Cheeseburger on Sept. 18 to celebrate National Cheeseburger Day.

The offer will be available exclusively through the McDonald's app , the company said in a news release provided to USA TODAY.

The burger behemoth offered the same deal for National Cheeseburger Day last year and called it "one of our most popular offers" in the news release.

McDonald's Double Cheeseburger has two beef patties, American cheese, pickles, chopped onions, and is dressed with ketchup and mustard, according to the company's website. The cheeseburger is a part of the Buy One, Add One for $1 deal. This is included in the new McValue menu offerings.

What is National Cheeseburge

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