Biogas produced from waste food or drainage gas has a composition of about 60 % CH4 and 40% CO2. Electrochemical reforming of this biogas, using a porous gadolinium-doped ceria (GDC) electrolyte reforming cell, with porous metal electrodes composed of nickel (Ni) or ruthenium (Ru), is an attractive process to produce H-2-CO gas used in an solid oxide fuel cell (SOFC). The supplied CO2 is converted to CO gas and O2- ions by reaction with electrons at the cathode (CO2 + 2e(-) -> CO + O2-). The produced CO gas and O2- ions are transported to the anode through a porous, mixed conductor, GDC electrolyte. In the anode, CH4 gas reacts with the O2- ions to produce CO, H-2, and electrons (CH4 + O2- -> CO + 2H(2) + 2e(-)). This process suppresses the usual carbon deposition owing to the presence of CH4. The formed H-2 and CO fuels were supplied to an SOFC composed of a dense GDC electrolyte (Ce0.8Gd0.2O1.9). The open-circuit voltage (OCV) and maximum power density were measured for both the reformed gas and for a pure H-2 fuel. Little difference in the electrical power output was measured for either fuels at a cell operating temperature of 1073 K.