Myco-Dwelling is a Design Research Studio focusing on the interplay of matter, form and fabrication in the design of customizable accessory dwelling unit (ADU) systems using actual mycelium-based building components. In the studio, the students worked in teams to develop customizable accessory dwelling unit (ADU) systems with lightweight and biodegradable mycelium-based building components. The students explored and tested their design ideas by cultivating physical (mycelium-based) prototypes in various scales and by integrating computational form-finding and fabrication technologies to the design process. The main focuses in the studio were 1) on the analysis, synthesis and generation of systems for customizable dwelling/housing units, and 2) on the interplay between mycelium-matter, form and fabrication processes. Through weekly lectures, hands-on trainings and tutorials, the studio introduced the students to the basics of cultivating mycelium-based architectural components, computational and systematic design thinking, material computation, and the use of generative design and advanced digital fabrication techniques in design.