Preheat oven to 400 degrees and grease a 9 inch pie pan.
In the bowl of a stand mixer, combine the sour cream, pumpkin, milk, vinegar, vanilla, sugar and 4 Tbsp melted butter until smooth.
Add in the flour, baking powder, salt, and baking soda. Blend just until a soft dough forms.
Roll dough out on a lightly floured surface into a 12 x 15 inch rectangle.
In a bowl, combine the brown sugar and pumpkin pie spice. Pour the melted 3 Tbsp of butter over the rolled dough. Spread out evenly. The sprinkle with the brown sugar mixture leaving a 1 inch border.
Roll up dough pinching seams shut. Cut into 12 slices.
Place 9 slices around the edge of the prepared 9 inch pie pan and place 3 in the center.
Bake at 400 degrees for 20-28 minutes until golden.
Once rolls are cooked mix together the glaze ingredients until smooth. Drizzle over cooked rolls. Serve rolls warm. If you can't eat them warm a roll can be reheated in the microwave for 10-20 seconds. Makes 12 rolls.