Soak the cashews in boiling water for 15 minutes to help soften them.
Drain and rinse cashews then add to a blender along with all the remaining ingredients. Blend on high for a minute or two or until the mix is completely smooth.
Pour the mixture into the Ninja Creami pint container no higher than the max fill line. Chill in the freezer for 24 hours without the lid. Leaving the lid off helps the ice cream base freeze flat without creating a dome on top.
Place the ice cream tub into the Ninja Creami outer bowl, then place the outer bowl lid on top and secure it. Next, insert the bowl into the Ninja Creami machine, locking it into place.
Select the lite ice cream function, to start the ice cream churn. This setting will take a little less than two minutes to complete.
Remove the lid, and if the ice cream looks a little powdery add an extra tablespoon of milk to the mix then put the bowl back into the machine and select the re-spin button. If it's not powdery, but still not smooth and creamy, just re-spin without the extra milk (see note 3).
Serve as is or with any variety of toppings you like. This recipe will serve 2-3 people.
Store any leftovers in the Ninja Creami tub but smooth the ice cream out and flatten the top with the back of a spoon before it goes back into the freezer. Simply re-spin the ice cream the next time you want to enjoy what's left.