To prepare the substituted cakes batters, the flour in the formula was substituted with watermelon rinds or sharlyn melon peels the ratios of at 2.5%, 5% and 7.5%. In other treatment, shortening in the formula was substituted with water melon rinds or sharlyn melon peels 5%, 10% and 15%. The same order of mixing as described for the control was followed. Cakes batters were placed in each pan and baked in oven at 180 C for 30 min. After baking, cakes were removed from pans and cooled at room temperature then packed in polyethylene bags and stored at room temperature for 21 days. Samples were taken after removal from pans within 1 hour and often 1 week intervals for analysis.