To a blender or blender bottle add 14 oz Fairlife 2% milk, protein powder, instant pudding mix and vanilla. Blend.
Pour in the creami container.
Cover and freeze for 24 hours.
Remove the lid, add the container to the holder and run on the lite ice cream cycle.
Remove the lid. Add peanut butter cups.
Run on the mix-ins cycle.
This will produce a hard scoop ice cream because you're only running the lite ice cream cycle and the mix ins cycle. If you want a soft serve texture, add 2 tbsp of milk after the lite ice cream cycle then run on the re-spin cycle. Then add the peanut butter cups and run on the mix-ins cycle.