In a large mixing bowl, combine rolled oats, your choice of nut butter, honey (or maple syrup), and protein powder. Use a sturdy spatula to mix these components thoroughly for about 2-3 minutes until you achieve a cohesive mixture that sticks together when pressed.

Gently fold in your selected mix-ins, such as chocolate chips, shredded coconut, and dried fruits, using your spatula until uniformly distributed.

Cover the bowl with plastic wrap or a lid and place it in the refrigerator. Allow the mixture to chill for about 30 minutes.

Scoop out tablespoon-sized portions of the mixture and roll them into 1-inch balls using your hands.

Place the rolled protein balls onto a parchment-lined baking sheet, ensuring they are spaced apart, and return them to the refrigerator for an additional 15-20 minutes.

After chilling, you can enjoy the protein balls immediately or transfer them to an airtight container.