Mash the ripe bananas well in a bowl.
Add the cocoa powder to the mashed bananas and mix well.
If necessary, add more cocoa powder to achieve the desired consistency.
Add the nut butter (such as almond butter) and mix until all ingredients are well combined.
Pour the mixture into a container lined with parchment paper.
Refrigerate and let it sit for at least 2-3 hours (the longer it rests, the better it will taste).
Before serving, dust with cocoa powder and cut into squares.
