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Jack in the Box has this coupon valid for a free Cheddar Onion Buttery Jack burger when you buy another. Good through Monday, November 9, 2015. Good at participating locations.
The Cheddar Onion Buttery Jack is a 1/4 lb beef patty topped with melted garlic herb butter, Cheddar cheese, crispy onions, and grilled onions, finished with a caramelized onion aioli and placed on a gourmet signature bun.