The 1970s was an era of disco music, bell-bottom pants, and unspreadable butter.

As margarine began to dominate supermarkets, a small diary farm on the NSW South Coast set out to change that by combining ingredients that could have seen them up on criminal charges.

Half a century later, Geoff Boxsell has been honoured for his invention with the University of Sydney's 2025 Dairy Science Award.

• Guest: Geoff Boxsell, dairy farmer
• Producer: Jason Whittaker