Cramer: General Mills now more appetizing for investors

Investors should buy General Mills shares because of the company's shift into more organic ingredients, and not because of Morgan Stanley's upgrade, CNBC's Jim Cramer said Wednesday.

"No offense to the analyst, but Ken Powell's reinventing the company, making it more natural and organic. That was not counted as one of the reasons why to buy it," Cramer said on "Squawk on the Street."

Morgan Stanley upgraded General Mills' stock from "underweight" to "equal weight" on Wednesday, citing a better response to industry cost/margin pressures.

"Following several years of below-expectation results, we believe Mills' willingness to more aggressively manage costs should offer improved EPS visibility during F2016, despite our continued topline concerns," the bank said.

Said Cramer: "Memo to Morgan Stanley: You should make your research more exciting when you do an upgrade. Mention artificial [flavors]. Be more rigorous and I will be more thoughtful of your upgrade."

Morgan Stanley did not immediately respond to CNBC's request for comment.

General Mills shares were higher in morning trade. (Click here for the latest price.)

Disclosure: Cramer's trust did not own GIS stock when this article was published.