Suggested is a mixture of matter, comprising: (a) steviol glycosides, (b) starch degradation products and (c) one or more phenolic sweetness-enhancing aroma substances selected from the group formed by hesperetin, phloretin, 1-(2,4-dihydroxyphenyl)-3-(3-hydroxy-4-methoxyphenyl)propan-1-one, 7,3-dihydroxy-4′-methoxyflavan and 5-hydroxy-4-(4-hydroxy-3-methoxyphenyl)-7-methoxy-2-chromanone. On condition that components (a+b) and (c) are present in a ratio by weight of from 1.99 to 99:1.