Carers of individuals with eating disorders (EDs) report high levels of burden and distress and describe a number of unmet needs. As a result, a number of interventions have been designed to support carers, including the “Maudsley eating disorder collaborative care skills workshops,” which comprise six 2‐hr workshops delivered over 3 months for parents and carers of people with EDs. The current study aimed to test a proof‐of‐concept that this workshop could be effectively delivered in 1 day. An additional aim was to assess whether the workshop had direct effects on carer skills. A nonexperimental repeated measures research design was employed, giving measures before and after a 1‐day workshop. Results suggested significant increases in carer self‐efficacy and carer skills, with moderate to large effect sizes. Qualitative analyses supported these results whilst also generating ideas to improve the 1‐day workshop.