To address the need for greener epoxies for 3D printing applications, a vitrimer based on a bio-based epoxy resin (Cardolite Lite 514HP) and cystamine was investigated. Cystamine was chosen as the cross-linker due to its dynamic disulfide bonds, bio-based nature and the presence of highly reactive aliphatic amine groups, enabling rapid network formation. Microfibrillated cellulose and ultrafine cellulose were used as fillers and rheology modifiers to formulate printable pastes. These printable bio-based pastes were then printed into cylindrical and vase structures via Liquid Deposition Modeling consisting of two consecutive steps: printing of the paste at RT followed by cross-linking in oven. Cystamine enabled curing of the printed within 30-80 °C range: low enough to prevent creep and deformation in the oven, yet high enough to avoid premature curing during the printing process. Prior this printing, the formulation was studied by DSC and the obtained vitrimers were characterized in terms of gel content, water absorption, and thermal resistance. The printability of the selected pastes was evaluated through rheological analysis, and a concentration of 13 wt.% MFC and UFC was identified as the optimal compromise between shear-flow behavior and structural integrity. The vitrimer behavior was confirmed by stress-relaxation measurements, showing a surprising decrease in relaxation time with the addition of cellulose and an overall activation energy in the range 36-38 kJ/mol. The vitrimers also demonstrated successful mechanical recyclability (1.5 h, 160 °C, 3.5 metric tons). Finally, a preliminary Life Cycle Assessment was performed to evaluate the environmental impact of the chemicals used and the recycling processe.