Urban food systems are a key lever for transformative change towards sustainability, and research reporting on the role of urban food initiatives in supporting sustainability is increasing. However, an overview of such initiatives and their transformative potential is lacking, as contextual and disciplinary-fragmented research complicates what insights can be drawn to support larger-scale sustainability transformations. We provide such an overview by synthesizing multidisciplinary research on

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... ban food initiatives and by exploring their transformative potential. We developed a typology for urban food initiatives and present a framework of processes and outcomes that are steppingstones to sustainable food system transformation. We show that different types of urban food initiatives perform distinct roles that support sustainability. Unpacking three areas of concern, we conclude with a future research agenda. This is a first step towards integration of urban food research and of providing urban food governance with the tools to shape more sustainable systems.