Food consumption accounts for a third of global greenhouse gas emissions in developed countries, with the hospitality industry, including restaurants, playing a significant role. While behavioural interventions show promise in promoting climate-friendly food choices, their implementation in hospitality operations poses significant challenges. This study integrates the operational perspectives of managers and staff with consumer behaviour insights to provide a more holistic understanding of intervention design in real-world hospitality settings. Through workshops with staff at an à la carte restaurant in a Swedish tourist destination, we co-designed a carbon label intervention and tested it in a field experiment. While the overall effect on consumer choice was limited, a substitution from high – to medium-emission dishes was observed. Moreover, our research offers a framework and practical insights for collaboratively designing behavioural interventions in hospitality. The study underscores the importance of staff engagement, guest satisfaction, and the need for ongoing adaptation in intervention design.