McDonald's Double cheeseburgers are just ... over an open flame sent its Double Charburger to the edge of space just in time for National CheeseburgerDay, thanks to an out-of-this-world mission ...
Denny’s: Denny’s Rewards members can get 20% off any burger on the menu for National CheeseburgerDay. Friendly’s: Friendly’s Fan Club members can get $2 off all cheeseburgers from Sept. 18-20.
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