Achieving the goals of the Paris Agreement requires increased global climate action for sustainable food systems, especially a reduction of food loss and waste and dietary shifts towards plant-based diets. Based on a sound analysis of existing multilateral cooperation this paper proposes four potential initiatives to increase climate ambition in the respective policy field: an international institution to support national food system frameworks, an initiative to strengthen a food system approach in international climate policy, a collaboration and exchange mechanism to implement the Planetary Health Diet locally and an initiative for an international food loss and waste accreditation scheme.