In a large mixing bowl, combine the peanut butter and honey until smooth.
Add the oats and protein powder, mixing well until combined.
Fold in chocolate chips and nuts or seeds if desired.
Use your hands to form small balls, about 1 inch in diameter.
Place the balls on a parchment-lined baking sheet.
Refrigerate for at least 30 minutes to firm up.
Transfer the protein balls to an airtight container.
Store in the refrigerator for up to a week or freeze for longer storage.
Enjoy as a quick snack or post-workout treat!
Adjust sweetness by adding more honey or using less protein powder.