McDonald's coffee was "decent and moderately strong," while Starbucks' was "strong, but burnt and bitter enough to make your eyes water," the magazine said.
McDonald's introduced coffee made from 100 percent Arabica beans, the kind used at Starbucks, a year ago.
The coffee from Starbucks, meanwhile, was determined to be "strong, but burnt and bitter enough to make your eyes water instead of open."
The testers also ranked coffee from Burger King and Dunkin' Donuts, which claims to serve nearly a billion cups a year. Neither stood up to the competition, the magazine said.
Burger King's brew 'looked like coffee but tasted more like hot water,' the report states, while Dunkin's 'was inoffensive, but it had no oomph.'
McDonald's was not only the best tasting, but was also found to be the least expensive cup, the magazine said.