The aim of work was to determine the suitability of vegetable fats, which vary in composition of fatty acids (especially trans isomers), for baking biscuit-fat cake. Quality of seven vegetable fats was examined. Quality assessment of dough was carried out as well as, technological and sensoric examinations of the cake received with the use of vegetable fats. The kind of applied fat was estimated to have a great influence on biscuit-fat cake properties. Trans isomers of unsaturated fatty acids had advantageous influence on the volume mass of dough as well as on the baked cake. Cakes baked with the liquid rape oil obtained average notes. The best results of sensory evaluation was obtained for cakes with the highest trans fatty acids content.