The interface region of a steady-state methane-air flame near a cooled, moving wall has been studied using laser spectroscopy in conjunction with a theoretical analysis. Theory and experiment are qualitatively similar for the methane concentration profile parallel to and 100 μm from the wall. Both show rapid methane decay with the experimental decay being weakly dependent on wall speed. The quantitative discrepancies between theory and experiment are most likely due to the overly simple one-step reaction mechanism used in the theory. Species diffusion is found to be an important effect in fuel decay near cooled walls.