In a large mixing bowl, whisk the cold milk into the vanilla pudding packet until smooth with no lumps. Add 3-5 drops of green food coloring and mix until the color is evenly distributed.

In a separate bowl, beat the softened cream cheese together with the powdered sugar until the mixture is smooth and creamy without lumps.

Gradually mix the green vanilla pudding mixture into the cream cheese mixture until fully incorporated and smooth.

Gently fold in the entire container of cool whip until the mixture is light and fluffy.

Stir in the mini marshmallows until they are well coated with the fluff mixture.

Transfer the mixture to a serving dish, cover with plastic wrap, and chill in the refrigerator for at least 1 hour to set and allow flavors to meld.

Before serving, top the fluff with whipped cream, red and green sprinkles, and a maraschino cherry on each serving.