Step 1

Preheat the oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper and spray with nonstick cooking spray. Set aside.

Step 2

In a large bowl, mix the yellow cake mix, vegetable oil, eggs, and vanilla extract until well combined. The batter will be thick.

Step 3

Fold in the chocolate chips until evenly distributed. Then, press the cookie dough into the baking pan. Use a spatula or your hands to spread it to the edges.

Step 4

Bake for 20-25 minutes until the edges are lightly golden brown and the center looks slightly underbaked.

Step 5

Take the bars out of the oven and let cool completely in the pan. When set, lift them from the pan with the parchment, slice into squares, and enjoy!