Preheat oven to 350 degrees.

Line a 9×13 inch baking pan with parchment paper. (leave an overhang on all sides.)

Set aside.

Beat together the brownie mix, eggs, oil, and water.

Continue to mix until smooth.

Take out 1⁄3 cup of the batter.

Set it aside.

Pour the remaining of the batter into prepped pan.

Beat the softened cream cheese, sugar, egg yolk, mint extract, and food coloring in a medium bowl with an electric mixer until the mixture is completely smooth. (about 1 minute).

Add the mini chocolate chips, stir in by hand.

Measure out large spoonfuls of the cream cheese mixture.

Dollop the spoonfuls on top of the prepared brownie batter. Next, add the dollops of rest of the brownie batter to the top of the brownie batter.

Using a knife create a swirl effect to mix the cream cheese mixture and the additional brownie batter.

Sprinkle additional mini chocolate chips on top.

Bake brownies at 350 degrees for 35-40 minutes. (Or until a toothpick comes out almost clean)

Remove from the oven.

Set aside until they have cooled.

Cut them into squares.