Add chocolate milk, protein powder, and PBfit to Ninja Creami container. Whisk or froth together until smooth.
Freeze for 24 hours.
Place the frozen container in Ninja Creami. Press the " Ice Cream" button; remove. If powdery, add 1-2 Tbsp more of chocolate milk.
Place back in Ninja Creami. Press the "Respin" button; remove. Respin another time if needed.
Create a small hole in the center; add 3 Reese's mini cups. Place back in Ninja Creami; press the "Mix In" button. Remove. Crumble 3 additional Mini Reese's on top.
Enjoy your Ninja Creami Peanut Butter Chocolate Protein Ice Cream!