Preheat oven to 180˚C.
Place Dr. Oetker Nona Brownies Chocolate Original, water, oil and eggs in a mixing bowl, stir until well combined (with wooden spatula or hand whisk).
Spread 90% of the brownie mixture evenly in a greased rectangle baking tray.
In separate bowl, beat together cream cheese, egg, sugar and vanilla flavour with an electric mixer until smooth.
Spread the cream cheese mixture over the brownie mixture in the tray. Top with remaining brownie mixture. Swirl the top layer into cream cheese to make a marble pattern.
Bake at 180˚C for 40 minutes. Set brownies aside to cool completely before cutting into squares.