Preheat the oven to 375 F/ 190C.
Add plantains to a blender or food processor and make puree.
Add pureed plantain and remaining ingredients to a large bowl. Mix well, until you have a thick, smooth dough.
On a large baking sheet that is lined with parchment paper (use some oil or spray on the paper to reduce the risk of sticking), add 2-3 tablespoon dollops of your mixture. Use the back of a spoon to smooth the mixture into a round, flat circle. It should come out to be about 3 inches in diameter, and less than ¼ inch thick.
Bake for 20-25 minutes or until buns just begin to turn golden. For a chewier bun, remove 5 minutes early. For a crispier bun, wait until you see the edges turn a more defined golden colour.