Cut margarine into eight cups flour until crumbly. Set aside.

Make a “well” in remaining eight cups flour.  Dissolve yeast in warm water and pour into “well.”

Add in remaining ingredients and mix well. Knead in sour cream if desired. Knead in flour-margarine mixture.

Refrigerate for several hours or overnight.

Divide into eight parts. 

Keep parts of dough which are not being worked with in the refrigerator.