The present invention relates to novel compositions X comprising following substances: (1) L-valine; (2) maltol; (3) naringin; (4) maltodextrine MD 14 (5) arabicgum (spraygum); (6) acetoin; (7) delta dodecalactone; (8) delta decalactone; and (9) massoia lactone; to the use of the compositions X for modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of at least one sweetener, sweetness enhancer or consumable product; and to a process for the preparation of the compositions X. Further, the invention relates to sweetener compositions comprising at least one sweetener and the novel compositions X; to a method of providing sweetener or sweetness enhancer compositions; to methods of modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of at least one sweetener or sweetness enhancer; and to tabletop sweetener compositions comprising the novel compositions X. The invention also relates to consumable product compositions comprising a consumable product and the novel compositions X; to methods of modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of a consumable product composition; and to methods of imparting rich taste to a consumable product.La présente invention porte sur de nouvelles compositions X comprenant les substances suivantes : (1) de la L-valine ; (2) du maltol ; (3) de la naringine ; (4) de la maltodextrine MD 14 ; (5) de la gomme arabique (gomme obtenue par pulvérisation) ; (6) de l'acétoïne ; (7) de la delta-dodécalactone ; (8) de la delta-décalactone ; et (9) de la massoia lactone ; sur l'utilisation des compositions X pour la modification, le masquage, la réduction et/ou la suppression d'un mauvais goût, d'un arrière-goût ou d'un goût sucré persistant désagréables d'au moins un édulcorant, un exhausteur de goût sucré ou un produit consommable ; et sur un procédé pour la préparation des composit