Dr Pepper Box Mix Brownies for 12

Instructions:

1. Preheat your oven to 350°F (175°C). Grease a 9x9 inch pan and line it with parchment paper, leaving an overhang on the sides.
2. In a large mixing bowl, stir together the brownie mix, eggs, vegetable oil, vanilla extract, and Dr Pepper. Whisk until the batter is smooth and glossy.
3. Gently fold in the semi-sweet chocolate chips and chopped walnuts using a spatula until evenly distributed.
4. Pour the batter into the prepared pan and spread evenly.
5. Bake for 30-35 minutes. The brownies are done when the edges are firm and pulling away from the sides and the top has a thin, crackly crust. A toothpick inserted into the center should come out with a few moist crumbs.
6. Let the brownies cool completely in the pan before lifting out with the parchment paper and cutting into squares.