While Canadian policy makers are considering expanding school food programs in Canada, parents remain primarily responsible for packing lunches. Although women perform disproportionate amounts of foodwork, including feeding their children on school days, little research has investigated mothers’ experiences of packing school lunches in Canada. Drawing on 14 interviews with mothers of elementary-aged children in British Columbia, this study explored how mothers experience and make meaning of packing school lunches. Mothers described lunch packing largely as an individualized responsibility for children’s nutritional health and general wellbeing. Mothers strived to enact largely unattainable ideals about packing a “good” school lunch and engaged in diverse forms of physical, mental, and emotional labour to do so. When mothers were perceived to fall short of elusive lunch packing ideals, mothers judged themselves and other mothers, and also reported feeling scrutinized by other parents, teachers, and their children. While assuming the bulk of labour related to school lunch work, mothers also forged connections with their children through lunch packing, which they viewed as emotionally meaningful and a symbol of their care, love, and parental responsibility. These findings show that mothers’ experiences with lunch packing are complex and wrapped up in notions of “good” mothering and feeding ideals. For mothers, a “balanced” lunch requires not only a nutritionally adequate meal, but also involves balancing various forms of labour and contradictory emotions about food work. Understanding mothers’ experiences of lunch packing is pivotal for successfully developing school food programs that meet the complex expectations of Canadian families.