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In the present study, the potential use of cold-pressed grape seed oil waste in a reduced-fat emulsion was determined. For this purpose, effects of cold-pressed grape seed oil waste on flow behavior, dynamic and 3-ITT rheological properties of the emulsions were investigated. Two different control samples with 10 or 30% oil content were prepared, and two different emulsions with 2 or 4% grape seed oil waste were produced. The flow behavior properties of samples were modeled by Hershel-Buckley model, and consistency coefficient (K), flow behavior index (n) and yield stress (ς0) values were determined. The effect of oil and waste content on the K values of samples was significant (p<0.05). The K values of samples were between 1.39 and 3.39 Pasn, and the lowest K value was obtained from the reduced-oil emulsion. A significant improvement in the K values of samples was observed by the addition of 2 or 4% grape seed oil waste. Oil and grape seed oil contents significantly influenced dynamic rheological properties of samples (p<0.05). G' values of all samples were higher than G'' in the whole frequency range, indicating that all samples showed viscoelastic solid character. Recovery properties of samples were investigated by 3-ITT test. The samples were subjected to high level of shear rate (150 s-1) in the second interval, and recovery trends were observed in the third interval. The results of this study suggested that cold-pressed grape seed oil waste could be used as a fat replacer in a reduced fat emulsion. [ABSTRACT FROM AUTHOR]