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This study was carried out to investigate the quality characteristics of muffins with added Pholiota adiposa powder. Muffins were prepared with different amounts of Pholiota adiposa powder (in 0, 2.5, 5, 10, and 15 % ratios to the flour quantity). For analyzing the quality characteristics during the manufacturing of muffins, the pH, moisture content, dough density, height, specific volume, baking loss, texture, color, antioxidant activity, total polyphenol content, and sensory test results were determined. As the Pholiota adiposa powder content increased, the moisture content of the muffins decreased from 26.72 to 22.56%. The hardness of the muffins was increased with increasing Pholiota adiposa powder content, with the muffins with 15 % Pholiota adiposa powder the hardest among all the samples. The inner color of the muffins, particularly the L and b values, decreased with increasing powder content compared to those of the control, but the a value increased. As the Pholiota adiposa powder content increased, the antioxidant activity and total polyphenol content of the muffins also increased. In the sensory evaluation, the muffins with 5 % Pholiota adiposa powder showed higher values than the control and the other samples in all aspects, showing that 5 % Pholiota adiposa powder could be incorporated into muffins to meet the taste and functional needs of the consumers