The day before: Peel bananas, break them into chunks, and freeze them at least overnight. I always keep banana chunks in the freezer for emergency ice cream sessions.
Whisk the melted coconut oil and the cocoa powder until it's a chocolate sauce.
Add the frozen banana chunks into a food processor and pulse until it's creamy. This might take a bit and you might have to scrape down the sides, but you will get there.
Once the ice cream is smooth, pour the chocolate sauce on top. Let it set (takes 1-2 minutes). Then give it another pulse until the chocolate is broken up into pieces.
Scoop the ice cream into bowls or ice cream cones and enjoy!