Drawing from a qualitative study with 105 families across Canada, this paper focuses on sixteen households in which one or more adults experienced significant social class trajectories in their lifetimes. Using semi-structured interviews and two photo-elicitation techniques, adults and teens articulated their perceptions of healthy eating, eating well, conflicts and struggles around food, and typical household food patterns. This analysis examines how habitus from class of origin can influence food dispositions, as well as how participants used food and talk about food to mark symbolic and moral boundaries on the basis of class. In particular, people used discourses of cosmopolitan and omnivorous eating, ethical eating, and healthy eating, as well as the moral virtue of frugality, to align or disidentify with class of origin or current class location. Our analysis shows that food can be a powerful symbolic means of marking class boundaries.