To use, remove starter from refrigerator, let stand at room temp for at least one hour. Stir well. Measure amount needed for recipe. Before returning starter to refrigerator, feed it starter food: 1 C. all purpose flour, 1/2 C. sugar, 1 C. milk. Stir well. Place in refrigerator. Stir once a day. Use again within 2-14 days.