In a large mixing bowl, whisk together the rolled oats, protein powder, and salt. Ensuring the dry ingredients are well-mixed prevents any clumps of protein powder in the final snack.
Add the creamy peanut butter, honey (or maple syrup), and vanilla extract to the bowl with the dry ingredients. Use a sturdy spatula or a wooden spoon to stir everything together until a thick, sticky dough forms.
Gently fold in the mini chocolate chips until they are evenly distributed throughout the mixture. Using mini chips ensures you get a little bit of chocolate in every single bite.
Check the texture of the dough. If it feels too crumbly to hold its shape, add water one tablespoon at a time until it reaches a rollable consistency. If it is too sticky, you can add a tablespoon more of oats.
Scoop about one tablespoon of the mixture at a time and roll it between your palms to form a ball. You should be able to make about 12 medium-sized protein balls.
Place the finished balls on a parchment-lined plate or tray. Put them in the refrigerator for at least 30 minutes. This helps them firm up and allows the flavors to meld together beautifully.