Add the bananas and nut butter to a food processor and blend until smooth.
Pour in the melted dark chocolate and blend again.
Pour into moulds or a lined cake tin. You can top it with an optional sprinkle of chopped nuts if you like a bit of a crunch.
Freeze for a couple of hours until set and enjoy!
Notes
* I used a 75% dark chocolate, but you can use any you like.** Any nut butter will work or you can use a seed butter like tahini or sunflower seed butter for nut-free version*** Store in an air-tight container in the freezer. Remove 10-15 minutes before serving.