An enzyme method of extracting oils, proteins and fermentable sugars from vegetable matter in an aqueous medium, including the following steps: a) adding water to the vegetable matter having a suitable particle size; b) adding an enzyme mixture containing at least one cellulase, at least one hemicellulase and at least one pectinase, the ratio between the pectinase activity and the cellulase activity being at least 0.14, the ratio between the pectinase activity and the hemicellulase activity being at least 7.10