The digital preservation of traditional culinary knowledge is essential to sustaining cultural identity amid rapid technological change. This study focuses on improving the usability of a semantic web-based portal for Indonesian traditional food through a user-centered design approach. The redesign involved card sorting, tree testing, and prototype usability evaluation. Key improvements include enhanced navigation structures, clearer labeling, and the application of interface patterns such as fat menus, breadcrumbs, and carousels. Usability testing showed notable increases in success rates and navigation efficiency, with a System Usability Scale (SUS) score of 85.5, indicating excellent usability. The integration of information architecture principles significantly improved user interaction and content discoverability. This research demonstrates that combining cognitive-oriented design with semantic data models creates more intuitive and accessible cultural heritage platforms.