我用的这个,这种酸奶机发酵6-7小时酸度就足够了. 时间越久,乳酸越多, 蛋白质凝结程度越高, 酸奶就越稠.冷冻过的酸奶也会自己变稠. 我临睡前做酸奶,早上起来把酸奶放进冰箱,加速变稠的过程
http://www.amazon.com/Salton-YM9-1-Quart-Yogurt-Maker/dp/B00004SUHY
http://www.amazon.com/Salton-YM9-1-Quart-Yogurt-Maker/dp/B00004SUHY