-Mix together 1 1/2 cups sugar and the cinnamon; set aside.
-In a small bowl, dissolve yeast and 1 tsp. sugar in warm water; set aside.
-In a large bowl, mix together milk, 2/3 cup sugar, 2/3 cup melted butter, salt, and eggs; add yeast mixture and 4 cups of flour to mixture; beat until smooth; stir in enough flour to form a slightly stiff dough.
-Turn dough out onto a well-floured surface and knead for 8 minutes.
-Place dough into a large greased bowl, cover, and allow to rise in a warm place until doubled in size, about 1 - 1 1/2 hours.
-Punch down dough and let rest for 5 minutes.
-Roll dough out onto a floured surface into a 15" X 20" rectangle.
-Brush 1/2 cup melted butter over dough; sprinkle cinnamon and brown sugar evenly over dough; sprinkle nuts evenly over dough, if desired.
-Tightly roll up dough and pinch edges together to seal; cut the roll into 12 - 15 slices using dental floss or thread.
-Coat the bottom of a 13" X 9" X 2" baking pan with 1/2 cup melted butter; sprinkle 1/3 cup brown sugar and cinnamon evenly in the bottom of the pan.
-Place cinnamon roll slices close together in the prepared pan; cover pan and allow to rise in a warm place for 45 minutes.
-Bake rolls in a 350 degree oven for 25 - 30 minutes, or until golden brown.
-Stir together powdered sugar, 2/3 cup melted butter, and extracts; stir in hot water, 1 Tbls. at a time, until the glaze reaches desired spreading consistency. (can add cream cheese)
-Spread prepared icing over slightly cooled rolls.