Archaeological and historical data on coastal California foodways illustrate the complex interaction between Native Americans and Spanish colonists during the Mission period and re ect adaptations by both groups to new environmental, economic, and social settings. Paleoethnobotanical remains from neophyte (converted Native American) contexts at Mission San Luis Obispo, Mission Vieja de la Purísima, and Mission Santa Cruz and from Spanish contexts at Mission Vieja de la Purísima and the Presidio of San Francisco provide evidence of both continuity and change in aboriginal/ neophyte diets, with little adoption of native foodstuffs by the colonists.