Blend the bananas,avocado, the molasses of your choice and raspberries in a food processor until the mixture is well combined.
Pour the mixture into a container, cover and freeze. ( I used a little enamel pot that came with a lid).
At this stage you could churn the mixture in an ice cream maker and let the magic happen that way. I opted to freeze the ice cream and then scrape the edges with a fork and mix it again. I did this every half hour for two hours.
Freeze for a minimum of six hours and let it come to room temperature (about 15 mins) before scooping it up and serving.