In a large mixing bowl, combine the peanut butter, honey, and vanilla extract. Stir until smooth and well-blended. Add the oats, ground flaxseed, protein powder, and mini chocolate chips. Mix thoroughly until the ingredients come together into a thick, cohesive mixture. If it feels too dry, add a small drizzle of honey or a teaspoon of water to help it bind.

Using a 2-tablespoon cookie scoop or your hands, portion the mixture and roll it into smooth, bite-sized balls. Arrange them on a parchment-lined tray, making sure they don’t stick together. Place the tray in the refrigerator and chill for 1 to 2 hours, or until the protein balls are firm and set.

Once chilled, transfer the protein balls to an airtight container. Store them in the refrigerator for up to a week or freeze for longer shelf life. These no-bake protein balls make a convenient and energizing snack for busy mornings or post-workout fuel.