What yeast is used in the Ginger Beer Kit? The Mad Millie Ginger Beer Yeast and Nutrient 5g is a strain of the species Saccharomyces bayanus.It is a wine-making strain of the type known as ‘Prise de Mousse’ which are commonly used for making champagnes and sparkling wines. Related articles What type of sugar do I need to make ginger beer and how much? Why does my ginger beer taste awful? How to Guide - Ginger Beer How long with my Ginger Beer last? Why does my ginger beer taste weak?