Preheat oven to 350. Line a 13x9x2 inch baking pan with parchment paper. This will allow you to remove the brownies easily from the pan and prevent burning
Prepare the brownie batter: Typically a box recipe will call for 2 eggs, ½ cup vegetable oil and 3 TBSP water. But every mix is different, I recommend you follow the box for ingredient amounts. Mix all ingredients together in a large mixer until fully combined.
Portion out about ¾ of the brownie batter and evenly pour into the parchment lined baking pan. Smooth into an even layer
Prepare the cheesecake batter: In a large mixing bowl, mix the room temperature cream cheese, and sugar together until combined. Then add in the matcha powder until the coloring is even throughout. Finally mix in the one egg and the melted white chocolate
Layer the cheesecake batter on top of the brownie batter. Spread evenly.
Dollop the reserved portion of brownie batter on top of the cheesecake layer. Using a butter knife, swirl the two batters into a marbled pattern
Bake the Brownies for 40 mins. Let it cool and lift brownies out of the pan using parchment paper. Slice into squares and serve.