Popcorn (IMAGE) San Diego State University Caption The molecule diacetyl is what makes microwave popcorn taste buttery. Credit Courtesy of the Popcorn Board Usage Restrictions Please give photo credit to the Popcorn Board License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.