I wasn't necessarily lookin for a vegan recipe, but was very interested in trying it with avocado. I read the reviews and omitted the oil all together. I made a few changes only for personal preference. Since I wasn't necessarily looking for a vegan recipe I used unbleached white flour instead of the whole wheat.
I used dark brown sugar and cut it in half, instead of white sugar and I used butterscotch chips instead of chocolate. Im not sure how these changes affected this being vegan, but they were so delicious that everyone ate all my brownies. I am looking forward to experimenting with different flavors.