Even soy milk can hereby easily prepare yogurt. Yogurt Preparation: 1 liter cold life milk pour (room temperature), 2 tablespoons favorite plain yogurt Stir with whisk and who wants to make a good probiotic yogurt this can with mixing of about 1g "Dr. Wolz intestinal flora plus" (= 6 billion good dextrorotatory lactic acid bacteria with 4 differnet. reach cultures per 1g) in 70g content. Approximately 12 hours in the unit leave (overnight). Allow to cool and then extract container in the refrigerator. If it is to go faster the milk leave something preheating (about 40 degrees) and 8 to 9 hours. Fresh milk, fresh organic milk for example, boil first and then leave to cool (about 40 degrees). In soymilk yoghurt I take the unsweetened Alnatura soymilk and Sojadejoghurt from the health food store and also 1g probiotic lactic acid cultures of Dr Wolz intestinal flora plus. I love soy yogurt itself produced.