###### Abstract  
This study sought to ascertain the necessity of crafting specialized multi-user interfaces for scenarios involving multiple users and to provide guidance for the design of multi-user human-computer interactions by identifying the disparities in the interaction behavior and user experience when employing a conventional one-user interface (OUI) recipe versus a multi-user interface (MUI) recipe in the context of family collaborative cooking. To address this objective, this study employed a before-and-after comparison approach. Subsequently, adult users submitted self-assessments of their experiences using the OUI and MUI. The evaluation tools included a user experience survey questionnaire and a Likert seven-point scale, including aspects such as visual confirmation, content, operation, and satisfaction. Post-experiment interviews were also conducted with family members. The MUI exhibited greater effectiveness in terms of visual confirmation, with the \"layout\" assuming a role analogous to that of \"text\" in facilitating visual confirmation. Moreover, the operation of the MUI was found to be somewhat enjoyable. Nevertheless, no significant disparities were observed between the OUI group and the MUI group concerning content readability and most operational aspects. Furthermore, the users described their satisfaction with the MUI to be superior to that of the OUI, offering fun, convenience, and a clear appearance. Findings from my research clearly demonstrate that it is both valuable and essential to design a dedicated MUI. m 2024164781661204781661204781661204781661204781661204781661204781661204781612047  
activities, such as the use of interactive blackboards/whiteboards in the education industry to enhance the atmosphere of teaching and learning [2; 7], in the construction of new ways of communicating and transferring information between the staff and the tourists in the tourism industry [6; 8], and in facilitating the medical discussions between doctors and patients with hearing impairment [9], and so on. We can find that previous research on multi-user interfaces has focused on large desktop screens, and efforts have been made to facilitate interactions between users who are unfamiliar with each other or who are not close to each other. In recent years, however, researchers have increasingly begun to focus on target groups such as families, couples, and generations. Because of the increasing popularity of handheld touchscreen devices (such as iPads, Microsoft Surfaces, and smart tablets), the need for multiuser interaction is becoming more common in more intimate family environments. [PERSON]'s team revealed the possibility of parents' acceptance of the shared use of controllable media technologies with their young children [10]. [PERSON], [PERSON], and associates showed that parents and children engage in high-quality interactions during joint participation in coding game applications (apps) [11]. In addition to these needs and behaviors of parents and children playing and learning together, but also in helping older members of the family to learn, [PERSON] and [PERSON], on the other hand, found that interface design engages family members and plays an important role in increasing motivation and effectiveness in the intergenerational learning process [12]. Beyond that, [PERSON], [PERSON] et al. conducted a study on the collective management of smart home system interfaces by multiple family members from the perspective of security and privacy [13]. [PERSON] et al. verified that family members sharing recipes and cooking together also promotes physical interaction [14] and so on. However, most of these studies still rely on traditional single-user interfaces. This study therefore wishes to explore the need to create multi-user interfaces on medium-sized screens in a home multi-user environment.