Prepare according to package directions and pour into greased 9 X 12 cake pan

For topping.... beat cream cheese, cornstarch, add egg, vanilla and beat until well blended

Add mango puree and mix well

Gently spoon or pour over brownie batter to cover

Bake at 350 for 40 to 45 minutes until topping feels springy and toothpick in brownie comes out clean