This chapter explores how radical co-creation can be facilitated in practice and what opportunities and challenges such processes entail. While traditional co-creation often focuses on collaboration between service providers and users within predefined frameworks, radical co-creation involves a more fundamental redistribution of power, where citizens and organizations jointly define problems and develop new solutions. Through a case study of an initiative aimed at reducing youth exclusion in Norwegian municipalities, we analyze how cross-sectoral resource groups worked together to identify local challenges and co-develop innovative approaches. Our findings highlight key mechanisms for fostering radical co-creation, including establishing shared problem definitions, strengthening interdisciplinary collaboration, and creating arenas for mutual learning. However, the study also reveals significant barriers, such as ensuring sustained commitment from key actors, addressing power imbalances, and embedding co-creation within institutional structures. While radical co-creation has the potential to generate more inclusive and adaptive welfare services, we argue that long-term impact requires structural changes that enable sustained collaboration and shared decision-making. This chapter contributes to the growing body of research on co-creation by providing empirical insights into how such processes can unfold in practice and by critically examining the conditions necessary for their success.