1. Using a hand mixer with the dough hook attachment, add in the bread flour mix, sugar, baking powder, baking soda, instant yeast, cinnamon, pumpkin spice, and salt. Whisk well.
2. In a heat safe measuring glass, add the water, butter, and vinegar. Microwave for 30-60 seconds or until it’s warm to the touch but not piping hot. Ensure it’s between 110 and 115 degrees F.
3. Using the dough hook attachment on a standing or hand mixer, add the water, butter, and vinegar to your dry ingredients. Mix at low to medium speed.
4. Once it’s nearly mixed, add in the pumpkin, then egg, and egg white. Continue mixing for 3-5 minutes on medium speed until well combined.
5. Now, let the dough to rest while you prepare to roll out the dough.
6. Cover your work area in plastic wrap (I covered my counter). Also, cover your rolling pin in plastic. Sprinkle the cornstarch on your work surface. I like to roll my pin in it.
7. Place your dough on your work station and begin rolling into a 13×18 rectangle. Make sure the sides are as even as possible.
8. Now, whisk together the brown sugar, cinnamon, and pumpkin spice for your cinnamon sugar filling.
9. Spread 6 tbsp of butter on your dough and sprinkle with the filling, careful not to break the dough.
10. Roll the dough up tightly into a log. Using flavorless dental floss or a sharp knife, cut 2-3 inches off each end, then cut the dough into 7-9 rolls.
11. Place the rolls into the dish. I like to preheat my oven to the lowest temp then turn off, open the oven for 10 minutes, and then place my rolls into the oven to rise. Just make sure they are in a warm (but not too warm) environment.
12. Let the rolls rise for 2 hours or longer until they double in size.
13. Once they’ve risen, preheat your oven to 350 F.
14. Bake the rolls for 22-28 minutes until cooked through. Let cool.
15. While the rolls cool, beat together your icing ingredients. You can either ice while still warm (my preference) or wait until they’re completely cooled for a more structured icing.
16. Top with some fresh orange zest if you’d like and enjoy!