McDonald's is going to experiment with serving breakfast all day.
The chain will start testing a 24-hour breakfast menu next month at several locations in San Diego, the company told Business Insider.
If the test is successful, McDonald's could expand it to other markets.
Testing all-day breakfast "makes sense," Janney Capital Markets analyst Mark Kalinowski wrote in a recent research note.
Some of the most "craveable" items on the McDonald's menu are the McMuffins and McGriddles, he noted.
But it could also cause major operational problems.
McDonald's stops serving breakfast at 10:30 a.m. in most markets because its grills aren't big enough to handle breakfast and lunch items.
"It comes down to the sheer size of kitchen grills," the company says on its website. "They simply don't have the room for all of our menu options at one time — especially considering we use our grill to prepare many items on our breakfast menu."
