Mix all ingredients in a bowl until well-combined.
Cover with plastic wrap and chill in the refrigerator for at least 30 minutes.
Once done chilling, roll into approximately 1 inch (2.5 cm) balls. (Cover hands in a light layer of butter or oil to facilitate rolling and avoid getting sticky hands.)
Lay out a thin layer of oats and chocolate chips on a cutting board or work surface and roll the balls in the mixture. Finish off by rolling each ball between your hands to pack in the oats and

Chocolate chips.

And you can use any oats and chocolate chip