NEW YORK (AP) -- Basking in the fanfare over its all-day breakfast menu, McDonald's is pushing its operational limits by testing the addition of another morning favorite to the lineup: the McGriddle.
The world's biggest burger chain plans to start offering an expanded all-day breakfast menu that includes McGriddle sandwiches in Tulsa starting Feb. 1. The test comes after customers complained about the absence of the McGriddle when McDonald's launched a limited all-day breakfast menu in October.
McDonald's expects the test to last for two to three months before deciding how to proceed.
The test comes as McDonald's rides high from its biggest quarterly U.S. sales jump in nearly four years, which the company said was boosted by all-day breakfast.
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