3D printing is becoming more common in the construction industry nowadays, therefore, it is vital to explore new building materials suited for use in this process. EPS-gypsum composite is a perspective candidate for 3D printing as it allows to obtain a building material with insulating properties while using recycled gypsum products from the construction industry as binder. This paper focuses on developing a 3D printable material by finding the most suitable ratio for EPS, gypsum binder and water for the mix. Five different mixes were tested to find the most suited one for printing, three of them contained retarding additives as well. Several fresh state properties of the printed material were tested, for instance, extrudability, buildability, rheology, setting time and fresh state density; tests with different printheads/nozzles and varying printing speeds were also carried out. Physical properties, such as moisture content and density of the cast and printed samples were determined. In addition, mechanical properties like flexural and compressive strength of the printed samples were tested. The obtained results enable the authors to evaluate the applicability of EPS-gypsum in the process of 3D printing. Further research is needed to improve both the design mix of this mix as well as the printing and testing technology which would allow to increase the quality of printed composite as well as explore its use as an insulating material in the construction industry.