Stepped-care models of treatment are underexplored in eating disorders. To enhance treatment outcomes, and informed by literature about adaptations to family-based treatment (FBT), we developed an FBT-based stepped-care model for adolescents with anorexia nervosa (AN) that was consistent with family preference (i.e., tailored) and responsive to adolescent needs (i.e., intensity). The aim of this study was to evaluate the effectiveness of this model in terms of remission at end-of-treatment.