In a medium mixing bowl, combine the peanut butter, protein powder, rolled oats, chia seeds (if using), honey, vanilla extract, and salt. Stir thoroughly with a wooden spoon for 2-3 minutes until fully blended.

If the mixture feels too dry, add water one teaspoon at a time until it reaches a cohesive dough-like consistency, mixing well after each addition.

Use a tablespoon to scoop out portions of the batter and roll each scoop between your hands to form smooth, bite-sized balls, about 1 inch in diameter.

Place the rolled protein balls into an airtight container, separating layers with parchment paper if stacking. Seal tightly to keep moisture out.

Refrigerate the protein balls for at least 30 minutes to help them firm up. They can be eaten right away or stored in the fridge for up to 1 week, or frozen for up to 3 months.