1.Mist a square 8 inch pan with cooking spray.
2.Mix everything together in a medium bowl and press into the prepared pan. Bake in a preheated 350 degree oven for about 5 to 7 minutes. Take out and let cool on the counter while preparing the filling.
1.In a heavy saucepan, pour in 1/2 cup of milk and add the marshmallows. Cook at low heat until all melted. Set aside for a few minutes.
2.Place the cream cheese and vanilla in a mixing bowl and using a hand held mixer, beat just until fluffy. add the marshmallow mixture and beat on low speed until all is combined.
3.Fold in whipped topping. Pour filling into prepared pan and smooth out.
4.Sprinkle with chopped chocolate on top. Place in fridge for at least 4 hours. Cut into squares. Store in fridge for up to 2 days. Enjoy!