According to the survey, 7 percent of Americans think chocolate milk comes from brown cows while 48 percent were unaware of how it is made. According to The Washington Post, this equates to roughly 16.4 million adults — slightly more than the Pennsylvania population. While the dairy industry-commissioned survey, which questioned 1,000 adults across 50 states, cannot speak for the entire U.S. population, it serves as an example of how a portion of the American public is misinformed about where food comes from. The Washington Post writer Caitlin Dewey pointed to a USDA study that showed that nearly one in five adults were unaware that hamburgers are made from beef.