Crush the OREO cookies into fine crumbs using a rolling pin or food processor, then transfer to a mixing bowl.
Melt 2 tablespoons of butter and pour over the cookie crumbs. Stir until the crumbs are evenly coated and resemble wet sand.
Line a cupcake or muffin tin with parchment paper or cupcake liners. Press the cookie crumb mixture into the bottom of each liner, packing down firmly. Set aside.
In a separate mixing bowl, beat softened PHILADELPHIA Cream Cheese and sugar together until smooth and creamy, about 2 minutes.
Gently fold the thawed COOL WHIP into the cream cheese mixture until combined, maintaining a light and airy texture.
Spoon the cheesecake filling over the prepared cookie crusts, filling each cup to the top and smoothing the tops with a spatula.
Place the assembled mini cheesecakes in the fridge for at least 2 hours or until set.
Once set, remove from fridge and sprinkle the tops with multi-colored sprinkles for a festive look.
Carefully peel the liners away from the cheesecakes and serve chilled.