Add all ingredients to a blender and blend together.
Pour into a Ninja Creami container. Freeze on a level surface for at least 24 hours.
Remove from the freezer and run warm water along the outside of the container to thaw the edges of the ice cream.
Process on the ice cream setting. If ice cream is crumbly, add a tiny splash of milk and respin. Enjoy!
Notes
Don't skip the step about running some warm water along the edge! That helps the very edge of the ice cream become unfrozen and process in the Ninja Creami.
As noted, if the ice cream is crumbly after processing, add a splash of milk and respin.
If you have leftovers, smooth out the top and return to the freezer. You may need to reprocess before enjoying again.