Thinly slice your bananas, place in a ziplock bag and place in the freezer until completely frozen (about 3-4 hours).
Remove bananas from freezer and allow 3-5 minutes to thaw very slightly (this will make it easier to blend). Place in food processor or high powered blender along with cocoa powder. Blend until smooth and creamy (if it is not blending try adding 1-2 tablespoons of dairy free milk).
Serve immediately along with optional toppings like chocolate chips, peanut butter, coconut whipped cream or anything else you enjoy!