People with Autism Spectrum Disorder (ASD) present communicationdifficulties, social interaction challenges, and restricted andrepetitive behavior. Most systems used by these users do not havesuitable user interfaces. This paper’s aim is twofold: (i) we presentthe creation of a catalog and an interface design process based onthe results of a systematic mapping of interface design methodologiesthat can promote accessibility for users with ASD, and (ii)a practical experience with the proposed process in the designof a mobile application for autistic children. The practical experiencewas conducted in a research project focused on designingand evaluating accessible technologies. The team that adopted theprocess provided feedback on its suitability and opportunities forimprovement. The results indicated that the process supports accessibleinterface design but designers can face difficulties in selectingsuitable interface guidelines to adopt.