Over the years, Mickey Dee's has experimented with lots of items in an effort to broaden their business beyond fries and burgers.
Egg McMuffin has been a huge success. The McLean DeLuxe, Onion Nuggets and Fried Roast Beef Sandwich were flops. The McRib sandwich was officially discontinued, but is periodically revived for a limited-time appearance. (I'm lovin it.)
Probably the most famous McDonald's failure was pizza.
Although it was popularly called McPizza (like McRib and McNuggets) McDonald's just called it pizza.
There were several versions test-marketed in various parts of the US and Canada starting in the late 1970s.
One variation was like an apple pie. There was also a personal-size pizza, and a family sized pizza that was brought out by an employee and placed on a raised rack on the table.
Although traditional pizza makers were scared by the Golden Arched threat, McDonald's never became a pizza power. It was just too difficult, too time-consuming, and too expensive to produce acceptable pizzas in a fast food facility. Most people who wanted pizza went to a pizza place, not to McDonald's.
Mickey's stores had invested big bucks in special ovens and even extra-wide drive-thru windows, but experimentation, variation, reconstruction and expensive marketing just could not make it work. My the late 1990s, McPizza was gone. (If anyone knows the actual year, please let me know.)
I tasted a Mickey Pizza once, on the Garden State Parkway. It was better than many "real" pizzas I'd had, not the worst, and certainly not the best. It was as good as what comes out of a Pizza Hut robotic oven.
I ordered it at the drive-thru window and then parked my car. About 10 minutes later, it was brought to my car. Strangely, Dunkin Donuts is able to produce their version of a Pizza Hut personal pizza in less than two minutes. Maybe Mickey Dee's gave up too soon.
Outside the US, McDonald's offers the vegetarian Pizza McPuff in India, Dubai and maybe other countries.