In a mixing bowl, combine the rolled oats and protein powder.

Add the peanut butter and honey to the bowl.

Add the vanilla extract and any mix-ins you choose, such as chocolate chips or dried fruit.

Mix everything until fully combined.

Using your hands, scoop out small amounts of the mixture and roll them into balls.

Place the formed balls on a baking sheet or plate lined with parchment paper.

Refrigerate the protein balls for at least 30 minutes.

Enjoy your protein balls immediately or store them in an airtight container.