Preheat the oven to 350ºF (175ºC). Grease and line your baking pans with parchment paper.

In a large mixing bowl, combine the white cake mix, instant vanilla pudding mix, egg whites, milk, sour cream, vegetable oil, and vanilla extract. Beat until smooth.

Divide batter into two bowls, adding green food coloring to one and purple to the other. Pour into prepared pans and bake for 28-30 minutes.

Let cakes cool in pans for 10 minutes before transferring to a wire rack to cool completely.

Whip the heavy cream until stiff peaks form. In another bowl, beat cream cheese and powdered sugar until smooth. Fold whipped cream into cream cheese mixture.

Layer green cake cubes, chopped Oreos, and cheesecake filling in serving cups. Repeat with purple cake cubes.

Decorate with remaining cheesecake filling and sprinkles. Refrigerate for at least 1 hour before serving.