“Despite What Some May Say, Chocolate Milk Does Not Come From Brown Cows”, All Things Considered2017-06-16 (; backlinks)⁠:

A survey of 1,000 people shows 7% of participants think chocolate milk comes from brown cows. The answer did not surprise dietitians, who discuss several common misconceptions related to food.

[Details are scarce, and the original survey has not been published according to Glendora Meikle:

A spokesperson for the Innovation Center told me the purpose of the survey was to “gauge some interesting and fun facts about consumers’ perceptions of dairy”, and the chocolate milk stat was apparently a winner. (She declined to respond to my queries about the wording of the questions, and said the full results of the survey were not intended to be published.)]