McDonald's is testing all-day breakfast again, roughly five years after the chain stopped offering it, according to a report from Barstool Sports.

The return, even in limited test form, reverses one of the most consequential menu decisions the burger giant has made in the past decade. McDonald's dropped all-day breakfast about five years ago and has not brought it back nationally since — a gap that turned the item into a persistent point of friction between the company and its customer base.

Details of the test — how many restaurants are participating, which markets, and whether the menu covers the full breakfast lineup or a subset — remain limited. Barstool's report confirms only that the chain is once again piloting the format, framing the move as a comeback for one of the most requested items among McDonald's loyalists.

For operators, the significance of all-day breakfast has always been operational rather than sentimental. Serving Egg McMuffins alongside Big Macs requires kitchens to run breakfast and lunch equipment — grills, egg stations, toast warmers — simultaneously, which complicates throughput during peak hours. That burden is the reason the format has been difficult to sustain at national scale.

The test suggests McDonald's is once again weighing whether the sales lift from breakfast demand outside morning dayparts justifies that complexity. If the pilot performs well enough to justify a broader rollout, it would mark the first national return of all-day breakfast since its removal five years ago.

McDonald's has not announced timelines for any wider expansion, and a test does not guarantee the menu will reach the full system, which spans thousands of franchised and company-operated locations. For now, the pilot stands as a measured step toward answering a question the chain's customers have asked relentlessly for five years.