Pour the chocolate Premier Protein shake into the Ninja Creami pint container. Add the xanthan gum and mix well.
Place the container on a flat, level surface in the freezer and let it freeze for 24 hours or until solid.
Remove the frozen pint from the freezer and run it under hot water for about 30 seconds to loosen it up. Remove the lid.
Place the pint container into the outer bowl of the Ninja Creami and lock the lid in place.
Secure the outer bowl into the machine and press the Lite Ice Cream button. Let the cycle run.
If the ice cream comes out powdery, place it back in the machine and press the Re-spin button.
While the ice cream is blending, chop up the Grenade bar.
Make a small hole in the center of the ice cream and add the chopped chocolate bar, caramel sauce, and sea salt.
Press the Mix-in button and let the Ninja Creami incorporate all that deliciousness.
Scoop into bowls, drizzle with a little extra caramel if you’re feeling fancy, and dig in!