1. Add the milk and the protein powder to a Ninja® CREAMi® jar. Froth until smooth. Cover and freeze overnight.
2. Remove jar from freezer and let thaw on the counter for 15 minutes.
3. Add the jar to the Ninja® CREAMi® Ice Cream Maker and spin on “Lite Ice Cream.” Remove and add two tablespoons of milk. Return to the Ninja® CREAMi® Ice Cream Maker and spin on “Re-Spin.”
4. Split into two servings. Top each serving with two peanut butter cookies and one teaspoon of peanut butter. Enjoy!