Place 1/4 cup of oats in food processor or blender; process until finely ground. Place ground oats, remaining 2 cups oats, cocoa powder and chocolate chips in large bowl; stir to combine. In small bowl, whisk together milk and honey until well blended. Add to oats mixture; stir to combine completely. Shape into 24 (about 1-inch diameter) balls. Refrigerate, covered until chilled. Store leftovers in refrigerator, covered.