Avocados contribute to giving brownies a fudgy texture and making them moist and rich without adding a ton of butter to the batter. The creamier and more ripe your avocado, the better! It also adds health benefits to the brownies since avocados are pretty good for you. However, don’t worry about the avocado taste if you’re not a huge fan, there is not a strong avocado taste in these brownies.