In a saucepan ¾tted with a thermometer, scald milk by heating it to 140°F, or until bubbles begin to form around the side of the pan and a ¾lm appears on the surface. Remove from heat and let cool to 110°F.
In the warm bowl of a stand mixer, or a glass or metal bowl, combine yeast and the warm milk and stir for 5 minutes, until the liquid appears slightly foamy