Peanut Butter Tree. One of the most fascinating exotic fruit, as amazing as Miracle fruit, Peanut Butter Fruit is loved by both kids and adults. Yes, it tastes exactly like peanut butter! Sweet, soft pulp with peanut flavor. The tree is small in size, grows 10-15 ft max, or can be kept as a bush. Starts fruiting within 2-3 years from seed! Keep it in a pot if you have limited space, can be grown indoors, too.