Combine 1-1/2 cups of the flour and yeast in to bowel of an electric mixer. In a separate bowl mix together the brown sugar and cinnamon. Set aside.
In a small saucepan, stir together the pumpkin, milk, sugar, 2 tablespoons of butter, and salt. Heat to 120 degrees F. Pour into your flour mixture with the egg. Mix until just combined. Stir in the remaining flour until you get a stiff like dough. Switch to your dough hook and mix for an additional three minutes.
Spray cooking spray in a medium sized bowel. Place your dough in the bowl and turn once to grease the top. Cover and rise until double in size.
Turn out onto a floured surface and roll into a 12 x 10 rectangle. Melt the remaining butter and brush onto your dough. Evenly sprinkle your brown sugar mixture and roll starting with the longer side. Cut into 12 pieces.
Place in a 9x13 pan, cover, and allow to rise until double. Preheat the oven to 375 degrees and bake for 20 minutes, or until lightly golden in color.