The objective of his paper was to assess the quality of some pastry products with a high content of fat, which were available in the market in 2003 and 2005. In particular, the content levels of fat and trans isomers of unsaturated fatty acids were taken into consideration. The highest content level of fat and trans isomers of unsaturated fatty acids were found in the filled wafers available in the market both in 2003 and in 2005. The isomers of oleic acid were the predominating trans isomers. The quantity of energy provided from the trans isomers of unsaturated fatty acids was very high; it was the highest in wafers, and, as next, in biscuits; and this fact was regarded as disadvantageous from the nutritional point of view.