Well, I finally found some. Thus, the pumpkintini could be mine. Here is the photo:
And all I can tell you was that it was disgusting. Ultimately, I figured out that it was because I used 100% pumpkin versus the "pumpkin pie filling" that the recipe calls for.
So I went on a search for pumkin pie filling...and couldn't find it anywhere. So I took the remaining pureed pumpkin and added brown sugar, cinnamon, cloves, "pumpkin pie spice", and allspice until it tasted similar to pumpkin pie filling. I didn't measure - I just kept adding and tasting, adding and tasting.
And here is the second attempt:
Again, I did not in any way like it or enjoy it. It was definitely improved - it tasted a lot less like a raw earthy alcoholic plant and more on the dessert end of things. But it still had a planty dullness to it...with the unpleasantness of an alcohol kick at the end.
So that is the end of the pumpkintini adventure. And I'm glad I can say I tried. I've heard that Sortilège is fantastic on vanilla ice cream so that may be my next experiment, as it's difficult to go wrong with vanilla ice cream and any fill-in-the-blank liqueur.
Eat, drink, and beware of cocktails with crushed graham crackers on the rim!