Step 1

Preheat the oven to 350 degrees.

Step 2

Spray a 9×13 pan with non-stick spray.

Step 3

In a large bowl, combine the brownie mix, water, oil, eggs, and chocolate chips until combined.

Step 4

Microwave the peanut butter for 30 seconds, until slightly melted.

Step 5

Drizzle the peanut butter over the unbaked brownies and use a knife to swirl it into the top of the batter.

Step 6

Bake for 28-30 minutes or until a toothpick inserted into the brownies comes out clean.