Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
                        HKDS25A
   4      cups          Lukewarm water
   1      package       Activated dry yeast
   1      tablespoon    VINEGAR -- VERY IMPORTANT<
     1/4  cup           Sugar
   5      cups          Unbleachd flour

Preparation:

Pour the water into a crock or a wide mouth gallon jar. Pour in the yeast and let it dissolve. Stir. Add vinegar, sugar and flour. Mix. Cover w/cloth and set in a warm place to sour..(2 to 3 days). When activity STOPS, the mixture flattens out. An amber colored liquor comes to the top..And it SMELLS.. THAT'S IT! Mix it up. It will look like whipping cream. Put it in a GLASS JAR with a screw type lid; place in refrigerator. IT WILL KEEP FOR MONTHS. Growing better as it continues to age at a very slow pace. I have no idea regarding conversion for use in BM. IF YOU DO.. Let ME know..Ho-Kay? It is super in pancakes; waffles; coffee cake; rolled bisquits; quick drop bisquits; cinnamon rolls; cobbler; BREAD; cake; oatmeal cookies; etc.. I wish you success and tasty eating.. DON'T BE AFRAID TO EXPERIMENT! Good Sour Baking to You for Yours.. Lyman, at Sunny, Reno Nev