A two-stage process for the production of briquettes consisting essentially of cellulose (sawdust, peanut shells) is proposed. The fuel material (in case with additives) is molded by high pressure to pellets of the size of a few centimeters. The pellets are mixed with flammable binding agents like paraffin, wax, polyethylene etc. and molded at a lower pressure or extruded in a second step. A suited molding device is described. The wax content could be lowered with respect to known processes.