I call these "Dr. Oz Brownies" because they were a food prop in my segment of The Dr. Oz Show. Some of my mom friends said that they make brownies by taking a boxed mix and adding a can of pumpkin to it and half a bag of chocolate chips. Since I LOVE peanut butter, I changed it a little to my exclude the chocolate chips but add some yummy peanut butter. When I told the producers how I like to make them, they decided to use it as part of the show (which was later cut out, unfortunately). I don't doubt there are a thousand different versions of these online, but here is how I make the super simple brownies.
These are extremely dense and fudge-like--not cakey at all. And they're rich! Which is why I love them :)
1 box of brownie mix (I use the Betty Crocker family size one)
1 (15 oz.) can of pure pumpkin
3 Tbsp. peanut butter
Just combine the brownie mix and pumpkin in a bowl (nothing else). It takes a while to mix, and the batter will be very thick, but don't add anything else to it. Spread it in an 8x8 or 9x9 pan. In a small bowl, melt the peanut butter in the microwave (about 30 seconds). Drizzle it on top of the brownie batter (and swirl it around to make it pretty, if you like). Bake for 30-35 minutes at 350 degrees. Let them cool completely before cutting (if they are warm, there is a strong pumpkin taste... once they cool, you don't taste the pumpkin). Cut it into 24 pieces (the pieces will be small, but because it is so rich, a small piece is satisfying).