I have experienced the exact same thing
Never, never, I repeat, never put pumpkin in the bag
Early in my forey into beer making I made two pumpkin beers. One had actual pumpkin and the other had pumpkin pie spice. There was really no flavor difference. If I ever did it again I would do spice only. The pumpkin in the beer added very little flavor (if any) and very few sugars to be fermented.
I've used 75 oz of toasted pumpkin puree in a 5 gallon batch mash (converted cooler with a manifold). Added some rice hulls. From what I remember, it was a slow lauter, but well worth it, a beautiful deep orange. It became a wonderful Imperial Pumpkin Ale.
So? Had they eaten all the grain yet?Opened the bag 2 weeks later on brew day and there were weevils everywhere.
Rice hulls...I recently discovered rice hulls make a big difference!
I recently discovered rice hulls make a big difference! I used them in the first two pumpkin ales I made which included canned (roasted) pumpkin in the (biab) mash, and I had no issues. The third time I decided to skip the rice hulls thinking it wouldn't matter, but I ended up with the same problem as the OP. It was a big, heavy, messy, nerve racking situation, esp since I brew on my kitchen stove. Next time will go back to using rice hulls.
The high ferm temp and brown sugar may have been your culprits. I made a 2.25G batch so only used one can of pumpkin. No brown sugar. Did add about 2oz molasses near end of boil (and spices). Pitched in low/mid 60s and fermented at 64. Batch #3 still in fermenter, but other two finished at 1.012 and 1.015. Neither seemed dry or had hot alcohol taste. To me they were smooth, just right amount of spice taste.How dry was your beer using the pumpkin? I used 2 cans and 1 # of brown sugar. It was way too dry for me . Plus I was 10 degrees too hot on my pitching temp . I thought I set my inkbird to 67 but it was 76. I think the hot alchoholy and super dryness came for high ferm temp and brown sugar
Sounds like a new hipster salad.it's like having a mouthful of straw and razor blades.