Add yeast to ½ cup warm water and sugar. Set aside until yeast bubbles.Add next seven ingredients (through eggs) to yeast mixture plus 1 cup of the flour and beat for 2 minutes on medium speed.With a wooden spoon, stir in remaining 2 cups of flour.Transfer to a greased bowl and turn once to grease top of dough; cover and let rise until doubled in size, about 1 hour.Punch dough down and transfer to a greased shallow pan (about 17×12×1-inch). Let rise 30 minutes.Spread evenly in pan and sprinkle evenly with brown sugar and cinnamon.Make shallow indentations with your fingers and dribble with the last ½ cup of melted and cooled butter.Preheat oven to 375 degrees and let dough rise 30 minutes.Bake until gold brown, about 12 to 15 minutes.