The dynamic viscoelastic properties of cookie doughs containing Nutrim OB were measured as a function of frequency and compared with those of the control (Fig. 1). For all samples, the storage and loss moduli increased with increasing frequencies,showing frequency dependence. All of the samples also had higher values of the storage moduli than those of the loss moduli, suggesting that they had more elastic properties than viscous properties. The control had the highest storage moduli and increasing replacement of shortening with Nutrim OB caused a decrease in the storage modulus. The same trend was observed in the loss modulus. The dynamic viscoelastic properties decrease with increasing moisture content in dough (Navickis et al., 1982; Dreese et al., 1988). Thus, the decrease in the dynamic viscoelastic properties of cookie doughs containing Nutrim OB would be attributed to their increased moisture content.