“I'm still off hamburgers.”
"Oprah: 'Free speech rocks' " in CNN (26 February 1998)
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Oprah Winfrey 143
American businesswoman, talk show host, actress, producer, … 1954Related quotes
"A Time to Laugh", p. 82; originally published as "A Happy Mystery to Ponder: Why So Many Homers?" in The Wall Street Journal (2001-10-10)
Triumph and Tragedy in Mudville (2003)

“Sacred cows make the tastiest hamburger.”
This has been attributed to Hoffman by referencing The New York Times (20 April 1989), but that article (Section A, Page 16) actually says "But the Rabbi also quoted one of Mr. Hoffman's favorite sayings: 'Sacred cows make the tastiest hamburger.'" This statement doesn't attribute the saying to Hoffman, but only says it was a favorite and presumably he used it repeatedly.
An earlier version is "Sacred cows make great hamburgers", recorded as an anonymous saying in Encyclopedia of Graffiti (1974) by Robert George Reisner and Lorraine Wechsler.
There are earlier instances of essentially this quote. In the form "Sacred cows make the best hamburger" it appeared in October 1965 in a student newspaper at Pennsylvania State University, The Daily Collegian, saying it was borrowed from Aardvark magazine, according to the Quote Investigator blog https://quoteinvestigator.com/2016/12/12/cows/.

Conversation was originally at a burger joint in Nashville, TN, but the story was recounted at a Speech honoring Martin Luther King, Jr., January 17, 2005, Clemson University.

“Nobody else in that platoon can tell a Hamiltonian from a hamburger.”
Source: Forever Peace (1997), p. 146

“We are, quite literally, gambling with the future of our planet- for the sake of hamburgers”
Source: Animal Liberation

“In spite of all that happened at Hamburg, bombing proved a relatively humane method.”
Statement on the July 1943 bombings of Hamburg, as quoted in The Valour and the Horror : The Untold Story of Canadians in the Second World War (1991)by Merrily Weisbord and Merilyn Simonds Mohr, p. 107
“On adultery: "Why fool around with hamburger when you have steak at home?”