Brem cake is a traditional fermented rice cake made from glutinous rice in east and central Java island, and eaten mainly as snack food. This cake divid into two types, one is Madium type (ash-yellow colour, sweet-sour flavour, small rectangle plate) another is Wonogiri type (white colour, solide sweet flavour, thin round block). Microorganisms concerning with fermentation was Saccharomycopsis spp. and Mucorales for degradation of rice starch. Saccharomyces is mainly concerned in alcohol fermentation.