Slice bananas and place in the freezer overnight or for about 8 hours.
When ready to make nice cream, remove the bananas from the freezer and let sit for about 5 minutes. Then place in food processor.
Add the almond milk and cashew butter to the food processor. Blend until smooth with no lumps.
If using unsalted cashew butter, add a pinch of salt and blend again. If using salted cashew butter, add as necessary to taste. It is not meant to be salty, but rather bring out the flavors.
Scoop the mixture into a freezer safe container. Add the chocolate chips and stir in.
Serve immediate for soft serve nice cream or place in the freezer for hard nice cream.