The invention concerns an aroma composition to reduce or suppress undesirable taste impressions, in particular a bitter, astringent and/or sweetener-like taste and/or long-lasting aftertaste of a sweetener, in the oral cavity, comprising (i) one or more sweeteners and (ii) ortho-coumaric acid (OCA) and optionally (iii) one or more specific bitter-masking aroma substances and/or flavourings and optionally (iv) one or more sweetness intensifying aroma substances and/or sweeteners and optionally (v) one or more inactive substances or carriers. The invention also concerns a preparation, containing such an aroma composition. The invention also relates to the use of ortho-coumaric acid or of certrain aroma compositions comprising ortho-coumaric acid for reducing or eliminating undesirable taste effects, in particular a bitter, astringent and/or sweetener-like taste and/or long-lasting aftertaste of a sweetener, and corresponding methods for reducing or eliminating the undesirable taste impression, in particular a bitter, astringent and/or sweetener-like taste and/or long-lasting aftertaste of a sweetener.
