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One of the most important research areas in the production of sweet bakery products is the use of sugar substitute sweeteners and the use of other plant sources flour as a substitute for wheat flour in the production of these products. In this study, sugar and wheat flour were substituted with isomalt and quinoa seed flour in cake powder formulation at four levels (25, 50, 75 and 100%). Based on the statistical results, replacing wheat flour with quinoa flour and replacing sugar with isomalt had a significant effect on the moisture content of cake powder samples as well as viscosity and density of dough (P <0.05). While sugar substitution with isomalt had no significant effect on insoluble ash content, pH and the total count of microorganisms in cake powder samples (P> 0.05).The results showed that replacement of wheat flour with quinoa flour reduced the moisture percent and increased ash content, pH and the total count of microorganisms of cake powder samples. Also, it increased viscosity and density of dough. The replacement of sugar with isomalt increased the moisture content and reduced the ash percentage of the cake powder sample. While the viscosity and density of the cake dough obtained from the cake powder increased. According to the considered characteristics of cake powder in this study, 25% replacement of wheat flour with quinoa flour and 25% replacement of sugar with isomalt (T1 treatment) were determined as the optimal treatment.

Keywords: : Low-calorie cake powder, Quinoa seed flour, Isomalt, Rheology, Physicochemical properties.

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