To make starter: in one gallon resealable bag mix ⅓ cup each of flour, sugar and milk.
DO NOT use a metal spoon or mixing bowl.
DO NOT refrigerate.
It's normal for the batter to rise and ferment. As air develops in the bag, it must be let out.
Day 1: Do nothing.
Days 2 - 5: Knead the bag.
Day 6: Add to the batter 1 cup each of flour, sugar and milk.
Days 7 - 9: Knead the bag.
Day 10: BAKING DAY. Combine in a large bowl 1 cup each of flour, sugar and milk, plus the starter batter. Stir well and pour off four 1 cup starters into resealable gallon bags. Keep one starter for yourself and give the other 3 away. To remaining batter add: above ingredients listed under "Add on Baking Day". Mix all ingredients together well. Pour into 2 greased loaf pans. Use additional sugar and cinnamon to sprinkle on the top. Bake at 325º for 50-60 minutes.