in a large microwave safe bowl use large because it will rise as it cooks microwave for 10 minutes stir after evey minutes up to four minutes add yogurt each time you stir now microwave 10 minutes stir after every minutes add remaining yogurt and powdered milk till blending when you reach 7 minutes of the 10 stir every 20 seconds it should thicken fast it may be a little loose it will be ok it will be absorbed.