Heat sour cream to boiling (3 minutes in microwave)
Add salt and margarine
Cool
Dissolve yeast in water
Beat eggs in mixer; add sugar.
Add cooled mixture to eggs/water/sugar and add soda.
Mix in 2 cups flour
Add yeast mixture.
Let sit for a few minutes, then add remaining flour.
knead
Place on floured surface; let rise for 5 minutes.
Roll dough into a rectangle. spread filling on the long HALF of the rectangle.
Fold the empty side over the filling and seal edges.
Cut into 1 1/2 inch strips.
TWIST and place on cookie sheets.
Let rise.
Bake at 350 for 15 minutes, interchanging top and bottom sheets at 8 minutes.
When baked, turn upside down on the counter.
Frost after eight minutes
FROSTING: Mix flour and sugar in a saucepan, then add the rest of the ingredients.
Bring to a boil.
Cool slightly then add powdered sugar. (The longer you simmer the frosting, the thicker it will get and the less powdered sugar you will need to add).