These are not your usual cakey muffin consistancy. Yet, they are very, very moist and they have a great texture. I followed the recipe exactly, and I added the blueberries. Banana, peanut butter, blueberries and pumpkin sound like an odd combination, but it really worked together. I couldn't taste the pumpkin.
These don't rise, so fill your muffin cups to the top. This recipe makes a solid 12 muffins, filled to the top.
The only thing I would add, and I will be adding next time, is salt. I found them a bit bland, but nothing that a little salt won't cure. This is the only reason I gave them 4 stars. When I put butter on them, it seems to fill that salt void. I am not a big salt fan, but I felt these did need a little bit of it. I sprinkled one with salt, ate it, and that was the missing ingredient.
Give them a try. They are healthy, low in calories and surprisingly filling. I eat one, I don't crave another and it stays with me longer than a sugary muffin ever does. I can eat one of these without the worry that I have just eaten empty calories.
I will make these again.