In large mixer bowl, combine 2 cups flour, granulated sugar, salt, cinnamon and yeast.
In small saucepan over low heat, warm butter, milk and water until very warm (120° to 130°F).
On low speed of electric mixer, gradually beat milk mixture into dry ingredients; beat for 2 minutes.
Add eggs, egg yolks and 1 cup flour.
Beat on high speed for 2 minutes.
Stir in about 2 1/2 cups flour to make a stiff dough.
Cover; let stand for 20 minutes.
In medium bowl, combine morsels, walnuts and brown sugar.
Sprinkle work surface with 1/2 cup flour.
Turn dough onto work surface; sprinkle with additional 1/2 cup flour.
Knead for 2 to 3 minutes; cut dough in half.
On floured surface, roll out one dough half into 16x10-inch rectangle.
Sprinkle one half morsel mixture to within 1/2 inch of edges.
Starting at wide end, roll up jelly-roll fashion; pinch seam to seal.
Place, seam side down, on large greased baking sheet, joining ends to from a circle.
Cut outside edge at 1-inch intervals, two thirds of way through.
Turn each slice on its side to overlap.
Brush with oil; cover with plastic wrap.Repeat with remaining dough and filling.
Chill for 2 to 24 hours.
Let coffee rings stand uncovered at room temperature for 10 minutes.
Bake in preheated 375°F oven for 25 to 30 minutes or until golden.
Remove from baking sheets; cool on wire racks.
Drizzle with Glaze.