Despite increased interest in dining as part of worship practices, accounts of cult meals often focus primarily on benefaction and consumption, ignoring or downplaying the practices of food preparation in and around sanctuaries. Synthesizing and analyzing kitchen spaces and their assemblages in sanctuaries dedicated to Mithras for the first time, we argue that the labor of food-making was also central to group-making in ancient cult. The display of kitchens and cooks, and the entailments of cooking installations, emphasized meat dishes and worked to create vertically stratified worship communities. At the same time, the diversity of food-production practices in Mithraic sanctuaries also suggests significant variety in how practices might have structured cult groups.