In a large mixing bowl, combine the white chocolate pudding mix with 2 cups of cold 2% milk and 2-3 drops of neon green gel food coloring. Using a hand mixer, beat the mixture on medium speed for about 2 minutes, or until soft peaks form.

Carefully pour the pudding mixture into the prepared Oreo pie crust, spreading it evenly.

Cover the pie with plastic wrap and place it in the refrigerator. Allow it to chill for at least 3 hours.

Once the pudding has set, remove the pie from the refrigerator. Gently spread Cool Whip over the set pudding layer.

Sprinkle ½ cup of green sanding sugar evenly over the Cool Whip, then scatter the mini red heart sprinkles on top.

Just before serving, place a large red heart sprinkle in the center of the pie as a finishing touch.

Slice the pie into wedges and serve chilled.