I found this recipe at http://vegancupcakes.wordpress.com/2007/09/17/pumpkin-pie-brownie/ and made it for Thanksgiving. It was a huge hit! Nobody ever would have guessed they were vegan. The brownie layer was super fudgy and the pumpkin topping was deliciously "creamy." I made it gluten-free by using Bob's Red Mill Gluten-Free All-Purpose Flour and adding the xanthan gum, but feel free to use wheat flour and omit the xanthan. For the 2 cups of pumpkin required for this recipe, you will need a 16-ounce can of pumpkin (NOT pumpkin pie filling) or about half a small sugar pumpkin, roasted and pureed (tastes MUCH better than canned...trust me!) For the spices you can sub about 1/2 teaspoon pumpkin pie spice. You can double the recipe for a crowd and bake it in a 13 x 9" pan.