I read a short story once where in the future they could synthesize foods (like Star Trek), and part of the challenge was to find the best flavors. At some point there is a combination formula going around that everyone agrees is the best tasting food ever. The end of the story is the person narrating who had figured out what the formula is simulating, and it’s people.

Also, Soylent Green is mentioned in the movie to be a very popular and preferred flavor, more than the past Soylent products.