In the microwave, melt 2 Tbsp butter. Add milk and microwave for 30 seconds, or until temperature reaches 100°-110°.
Pour milk and butter into mixing bowl. Add yeast and allow yeast to proof for 5 minutes.
Add pumpkin and salt and mix together. Mix in flour 1/2 cup at a time until the dough cleans itself from the side of the bowl.
Use dough hook attachment to knead dough for 6-8 minutes.
Place dough in a lightly oiled bowl. Cover and allow to rise for 1 hr.
Punch dough down and roll into a rectangle.
Melt butter for filling. Spread butter on dough.
Mix sugar and cinnamon together. Sprinkle over dough.
Roll dough, then cut.
Place cut rolls into greased 13x9.
Allow dough to rise for 30 minutes.
Bake at 350° for 20-25 minutes.
Melt butter for glaze. Add brown sugar and stir until everything is melted.
Add vanilla and powdered sugar. Stir together.
Pour over cinnamon rolls after they have finished baking.