The nonintrusive techniques of planar laser-induced fluorescence, ultraviolet/visible absorption spectroscopy, and spontaneous laser Raman spectroscopy were used to map out species and temperature profiles above the surface of self-deflagrating cyclotetramethylene tetranitramine (HMX)/glycidyl azide polymer (GAP)/butanetriol trinitrate (BTTN) model propellant with a pseudo premixed flame. CO, H 2 O, NO 2 , and H 2 CO were found to be the major species at the surface, NO, CO, H 2 O, and HCN in the dark zone, and CO, H 2 , H 2 O, and CO 2 in the burnt gases. A dark zone of about 1400-1450 K was observed in which the NO and HCN concentrations were at their highest, about 15.5 and 13.5 mol%, respectively. NO 2 peaked close to the surface at about 5 mol%. Formaldehyde and N 2 O were also observed in the gas phase, peaking at the surface at about 7 and 8 mol%, respectively. Thermal diffusivity and specific heat capacity as a function of temperature were also measured. Analysis of thermocouple measurements showed a surface temperature of 785 K. Comparisons are made between this propellant and the previously investigated cyclotetramethylene trinitramine (RDX) analog.