This chapter argues that feminist International Political Economy (IPE) could benefit from an institutionalist turn. It elaborates why feminist IPE (FIPE) should incorporate a feminist institutionalist (FI) approach and ends by outlining an FI research agenda for FIPE. It argues that adopting an FI approach would add to FIPE in two important ways. First, it would improve our overall understanding of global governance. In Jacqui True’s words, we already know quite a lot about the governance of gender but less about the gender of governance, which is exactly what FI could provide. Second, FI provides a new lens through which to analyse individual global institutions. It moves us away from looking at their inputs and outputs and opens up the ‘black box’ of global governance institutions (broadly defined). A FI approach also improves our analyses not only of the formal and informal institutions of global governance, but also of the actors within them.