Combine 1-1/2 cups flour, yeast, sugar and salt in a large mixer bowl.  Heat water, sour cream and butter until very warm (120º to 130ºF).  Add sour cream mixture, eggs and orange peel to mixer bowl.  Beat for 2 minutes on medium speed.  Add enough remaining flour to form a soft dough.   

Knead on lightly floured surface for 6 to 8 minutes, until dough is smooth and elastic.  Cover and let rest 10 minutes.

Roll dough into a 18 x 14-inch rectangle.  Whisk together brown sugar and cinnamon.  Spread 1/4 cup butter evenly over dough followed by cranberries and walnuts.  Gently press cranberries and walnuts into dough.  Evenly sprinkle brown sugar mixture over cranberries and walnuts. 

Fold dough in half; widthwise.  Cut dough into 12 equal strips; lengthwise.  Grab each end of the folded strip and twist while forming a knot.  Place the 12 knots on 2 greased baking sheets.  Cover and let rise until doubled in size, about 30 minutes. 

Bake in a preheated 350ºF oven for 14 to 17 minutes until browned.  Cool pans on wire rack.   

Combine powdered sugar, 1 tablespoon butter, and juice of one orange.   Mix well.  Drizzle over warm rolls.