I use a sugar pumpkin (typically 4-5 pounds) that easily yields about 6 cups. Precision isn't super important, but you want about 5-6 cups.
Removing the skin is the most difficult part of breaking down a pumpkin. I leave the skin intact, scrape the seeds and hairy stuff from the interior, brush with coconut oil, and roast.
If your cinnamon sticks don't smell intensely of cinnamon, they're not fresh. Add 1 or 2 extra.
Ginger beer is available in alcoholic and non-alcoholic versions. Ginger ale isn't really a great substitute if you love the flavor of ginger as it is more subtle. Ginger beer (both alcoholic and non-alcoholic versions) are gluten-free, but be sure to check the label. For more info...
Calorie count is taken from commercial pumpkin butter, and is approximate only.
Try mixing in with yogurt, topping granola, on pancakes and French toast, etc.