terrycorum.com

4 cups milk, plus 1/2 cup non-fat powdered milk
2 tablespoons plain store bought yogurt
Directions:
Let the store bought yogurt sit at room temperature while -
warm the milk to 180 degrees and let cool to 110 degrees. Stir frequently while warming so it doesn’t scorch.
Stir a little of the 110 degree milk into the store bought [...]