I heart Pumpkin
Pumpkin-Swirl Brownies - Martha Stewart Recipes. These are amazing, though a bit labor intensive (worth it to me). The cayenne cranks up the sophistication level to dinner-party-worthy. The pumpkin brings a lot of moisture, so you're better to slightly over-cook than under, unless you want a chocolate pumpkin puddle.
Creamy Pumpkin-Swirl Brownies -These sound Delicious!