People increasingly make choices about their food intake in digital environments (e.g., online food delivery, online grocery shopping, online school canteens). Given the critical role of diet quality as a key driver for non-communicable disease, it is vital to understand how to design such systems to facilitate healthy food choice through digital nudging. To better understand the impact of digital technologies on food choice, we need to understand the knowledge structure of previous literature. A systematic review of literature identified 83 relevant publications which have been included in this study. Bibliometric analyses were used to map out the knowledge structure, historical roots, and evolution. Reference year spectroscopy, co-word analysis and co-citation analysis were used. Findings show digital nudging is a rapid growing field with strong historical roots in psychology. Additionally, current literature is utilizing psychological theories during the development of digital technologies aimed at nudging consumers towards healthier food options.