Cut up cinnamon rolls into 4ths. Spray inside of bundt pan with non stick spray. Preheat oven to 350F.
Put white sugar in a large baggie (or a bowl). Add half of the cinnamon rolls that have been cut into bag, close, and gently shake to coat pieces (or put in bowl and gently stir pcs. with sugar until coated).
Place one layer of cinnamon rolls into bottom of bundt pan.
Sprinkle some walnuts (and caramel bits if you want to add them) then another layer of sugar coated cinnamon roll pieces until everything is gone and layered inside the bundt pan.
Microwave butter, brown sugar, pumpkin, and pumpkin spice for 30 sec., stir, then 30 more sec. until it's warm and bubbly.
Pour half of mixture on top of layers inside of bundt pan.
Put in preheated oven at 350 degrees for 30 -35 min. checking after 30 min. to ensure it doesn't get overdone.
Take out and loosen sides with a knife. Let it sit for at least 10 min. before turning over.
Put large plate or cutting board on top and flip over (should slide out if you sprayed it well). Reheat butter mixture and pour on top. Serve!!
Video
Notes
Rhodes Rolls Pumpkin Monkey Bread (option)
You will want to take out 20 frozen rolls or frozen cinnamon rolls. Lay on a piece of parchment paper with a piece of saran wrap (that has been sprayed with non stick spray) on the top. Leave in single layer on counter for about 3 hours until they double in size. Then quarter each one and continue on with directions above.