In a large mixing bowl, combine the rolled oats, protein powder, chia seeds, and salt.
Add the peanut butter, honey (or maple syrup), and vanilla extract to the dry ingredients.
Mix everything together until a thick, sticky dough forms. If the mixture is too dry, add a little more honey or a splash of milk.
Fold in the mini chocolate chips until evenly distributed.
Scoop out tablespoon-sized portions and roll into balls using your hands.
Place the protein balls on a baking sheet lined with parchment paper and refrigerate for at least 30 minutes before serving.