As an attempt to make an apple-pumpkin cider, I brewed a graff like recipe a month ago. I followed Brendon's recipe except for the following changes:
-Used Rogue's pacman yeast (cultured from the shakespeare stout, used just because I wanted to try it out)
-Added Centennial hops as per recipe, but also added 1/2 oz for dry hopping
-Added a pumpkin and spice slosh to the secondary for a week. Not knowing that pumpkin is best to be mashed with the grain load, and forgetting to do so during the mash/brew day, I wasn't sure how to prepare it to be added to the secondary. I know that I could just add pumpkin pie spices, but i really wanted to add pumpkin into the beer. Some reading on HBT revealed that unmashed pumpkin can leave a starchy mouth feel, and doesn't add much. In an attempt to reduce this, I "mashed" 4 16oz cans of organic pumpkin (added about quarter gallon of H2O) at 150F for 45mins (couldn't find on google whether pumpkin even has B-amylase, but what the hell), strained the slosh so as to minimize the retention of fiberous clumps, added spices (quarter tsp of each: nutmeg, cinnamon, allspice, ginger)to the liquid run off, and boiled for 10mins. I then cooled and added with the dry hops to the secondary.
I tasted it at bottling and could not detect a strong pumpkin flavor, but also did not detect any starch off-flavors. It's only been a week, so in about another week or two I will crack one open and report on the final product.