A sweetness modifying composition comprising at least one high-intensity sweetener chosen from steviol glycosides and/or mogrosides and at least one low-potency sweetener chosen from cellobiose, psicose, cyclamate and/or 11-O-mogroside V, and a sweetened composition comprising said sweetness modifying composition and at least one other sweetener; the uses of said sweetened compositions and sweetness modifying compositions; methods of making said sweetened compositions and sweetness modifying compositions.