Cookies were made from flour blends of 70% wheat and 30% sweet potato fortified with varying levels of brewers spent grain (BSG) flour. The BSG flour ranged between 0 and 9% of the flour weight. Cookies made with flour from 100% wheat served as the control. Studies were carried out on the functional properties of the flour blends, proximate composition, calorific values, physical characteristics and organoleptic quality of the cookies produced. Fortification of the blends with BSG flour reduced the bulk density from 1.24-1.08 g/mL and the water absorption capacity from 1.73-1.37g/g. Emulsion capacity increased from 76.10 – 83.45% and oil absorption from 2.20 – 3.66 g/g. The protein, fiber and ash contents of the cookies increased from 10.10-11.32%, 1.91-3.11% and 3.87-5.31% respectively. Cookies containing 9% BSG flour had the highest fibre content. Organoleptic studies revealed that cookies fortified with 3-6% BSG flour were more preferred than the control.