PREHEAT oven to 350° and crush cookies in a food processor or with a rolling pin.
LINE 18 muffin cups with paper liners and place approximately 1 tablespoon of cookie crumbs in the bottom of each one.
USING an electric mixer, beat the cream cheese and sugar until creamy. Add the eggs, vanilla brownie mix, beating after each ingredient. Stir in the chocolate chips by hand and place a spoonful of batter into each prepared muffin liner (fill liners almost to the top).
BAKE for 22-25 minute and let cool completely.
TOP with a dollop of Cool Whip and any extra chocolate chips or sprinkles just before serving.