Mix Base Ingredients: In a large mixing bowl, combine the cream cheese, crushed Oreo cookie crumbs, protein powder, milk, and vanilla extract. Blend these ingredients together for about 2-3 minutes until smooth and creamy.

Adjust Consistency: Check the mixture's consistency. If it's too dry, gradually add more milk until you achieve a dough-like texture.

Shape Balls: Scoop out portions of the mixture and roll them into smooth balls, placing them on a clean surface.

Prepare for Chilling: Line a baking sheet with parchment paper and transfer the shaped balls onto the sheet, ensuring they are spaced.

Chill: Place the baking sheet in the refrigerator and let them chill for at least 30 minutes.

Serve or Store: Once chilled, enjoy the protein balls right away or store them in an airtight container in the fridge for up to a week.