Put cookie crumbs and cream cheese in a food processor and extract, if using it. Pulse until mixture is combined and forms a large ball. Mixture should not be crumbly and hold together, but not be too sticky to form into balls. See notes if not the case.
Form small balls of cookie mixture (*a great part to let kids help with!) and place them on a tray sprayed with cooking spray to prevent sticking. Freeze until hard, 30 min-hour.
Remove from freezer. Melt chocolate chips in the microwave or on the stove. Dip each frozen cookie ball in the melted chocolate and place back on tray. We make this process easier by stabbing each frozen ball with a toothpick for dipping, then removing once placed on tray and covering up the hole with a small dab of melted chocolate.
Repeat with all frozen cookie balls. Top with decorative chocolate, nuts, or melted chocolate squiggles. Store in the freezer or fridge.