In a large mixing bowl, combine the rolled oats, chocolate protein powder, unsweetened cocoa powder, and a pinch of salt. Mix well to evenly distribute the dry ingredients.

Add the natural peanut butter, honey (or maple syrup), and vanilla extract to the bowl. Mix thoroughly until the ingredients form a sticky, cohesive dough.

Fold in the dark chocolate chips, ensuring they are evenly incorporated into the mixture.

Using clean hands or a small cookie scoop, roll the mixture into bite-sized balls approximately 1 inch in diameter.

Place the protein balls on a parchment-lined baking sheet or tray. Refrigerate for at least 30 minutes to allow them to firm up.

Transfer the chilled protein balls to an airtight container for storage. Keep them refrigerated for up to 1 week or freeze for longer storage.