Introduction Avoidant/restrictive food intake disorder (ARFID) can occur in children with typical development and persist past childhood. This significantly impacts most areas of children's lives, but may become more evident in teenage years, especially socially. There is an empirically supported treatment for ARFID with 40 years of research backing, this being behaviour‐analytic feeding interventions. However, application to individuals over age 12 is lacking, and needs to be investigated for effectiveness. This is important as the addition of ARFID (formerly called feeding disorders) to the DSM‐V has seen an increase in new treatments for ARFID by attempting to apply eating disorder treatments to this population including children. More research is needed to identify if already established behavioural intervention procedures are effective for ARFID in individuals with selectivity, without disabilities, older ages, and in settings outside of intensive specialised feeding hospital admissions in the United States. Method A 13‐year‐old female with ARFID and years of failed treatment attempts participated in her home in Australia. We conducted multiple stimulus without replacement preference assessments and used a changing criterion design with multiple baseline probes. Treatment consisted of demand fading, choice, differential attention, and contingent access. We did not use cognitive or family based treatment. Results Consumption increased to 100%. Variety reached 61 foods across all food groups. She met 100% of goals and ate at a restaurant. Caregivers reported high satisfaction and social acceptability. Gains were maintained at 9 months. Conclusion This brief, behaviour‐analytic in‐home treatment was effective in increasing food group variety consumption.