Cellular materials (also known as porous materials or aerogels) have found wide applications in engineering and technology. Creating cellular materials with emerging new materials and explore their potential applications arise as new challenges in the advent of nanomaterials age, especially that of two-dimensional (2D) materials – materials that are only a few atoms thick, such as graphene. We have developed a novel, facile, and scalable fabrication method for fabricating cellular structures using 2D materials using additive-manufactured, polymer-based lattices as the initial sacrificial scaffold. These polymeric scaffolds were first dip-coated in 2D material solution followed by drying and thermal etching of the polymer scaffold, resulted in a neat 2D material lattice. We have fabricated cellular solids of reduced graphene (rGO), Mxene, Molybdenum disulphide (MoS2), as well as heterogenous rGO/MoS2. These lattice structures were subjected to thermo-electro-mechanical characterization, and it is demonstrated that the hydrothermal-assisted fabrication process is adaptable for different architectures based on 3D printed scaffolds and thus could have broad functional applications.