The present invention relates to a method for increasing the degree of glycosylation of a composition comprising steviol glycosides, which method comprises: a. contacting said composition comprising steviol glycosides with a recombinant microorganism, a cell free extract derived from such a microorganism or an enzyme preparation derived from either thereof; and b. thereby to increase the degree of glycosylation of the composition comprising steviol glycosides, wherein the recombinant microorganism comprises one or more nucleotide sequence(s) encoding: a polypeptide having ent-copalyl pyrophosphate synthase activity; a polypeptide having ent-Kaurene synthase activity; a polypeptide having ent-Kaurene oxidase activity; a polypeptide having kaurenoic acid 13-hydroxylase activity; and one or more polypeptides having UDP-glucosyltransferase activity whereby expression of the nucleotide sequence(s) confer(s) on the microorganism the ability to produce at least one steviol glycoside. The present invention also relates to a composition comprising steviol glycosides obtainable by such a method.