"He's just starting. Wait until you see how he unlocks the technology for the company. He's got ideas that are just blow away," Cramer said on "Squawk on the Street."
From Cramer's perspective, Easterbrook, who took the reins just under a year ago, decided to start fixing the fundamentals. He focused on its difficult menu, costly mistakes and long lines at the drive-thru.
But behind the scenes, he pulled off what was viewed as an impossible move — getting the support of its franchises, Cramer said. Not to mention that the all-day breakfast that McDonald's successfully launched in the United States is "such a major hit," according to Cramer.
"He is an engineer, and he has brought great joy to the company which has amazing momentum," added Cramer.
Sales at U.S. restaurants open at least 13 months rose 5.7 percent, handily beating the average estimate of 2.7 percent.
Shares of the fast food giant were up 1 percent midday Monday.
"[McDonald's] really is an old dog, and it is doing new tricks," said Cramer.
— CNBC's Abigail Stevenson contributed to this report.