Meanwhile, make the filling by stirring together the sugar and pumpkin pie spice.
Roll dough into a 10x15-nch rectangle using a rolling pin. Spread the butter all over the dough in a thin layer. Sprinkle with filling.
Beginning at the long side of the dough, roll up tightly. Slice into 12 equal pieces.
TIP: use unflavored dental floss to slice your rolls! Cut a piece of floss and slide floss under roll. Bring sides of floss up to cross on top and slice through the dough. Works like a charm!
Place rolls in a 9x13-inch baking pan that’s been sprayed with nonstick cooking spray.
Cover rolls and let double in size, about 1 hour.
Preheat oven to 350°F. Once risen, bake cinnamon rolls for about 25-30 minutes or until golden brown and the center is cooked through. Cool 20 minutes before frosting.
Make the frosting: add butter, powdered sugar, vanilla, salt and pumpkin pie spice to a large bowl. Beat with a hand mixer until crumbly. Add 2 tablespoons milk and mix until combined, adding up to 1 more tablespoon milk for desired consistency.
Frost slightly cooled rolls.
Store covered for up to 2 days.