Ingredients:

  • 1 (15.25 oz) box Yellow Cake Mix
  • ¾ cup unsalted butter, melted
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • ¼ teaspoon fine sea salt
  • 1 cup semi-sweet chocolate chips, plus extra for topping

Instructions:

  1. Preheat your oven to 350°F (175°C). Line the 9x13 inch baking pan completely with parchment paper, leaving an overhang on the two longer sides.
  2. Gently melt the butter until completely liquid. Set aside to cool slightly for 2-3 minutes.
  3. In the large mixing bowl, whisk together the slightly cooled melted butter, eggs, and vanilla extract until well combined.
  4. Add the entire box of cake mix and the salt to the wet mixture. Use a rubber spatula to fold the ingredients together until just combined. Stop mixing as soon as no streaks of dry mix remain.
  5. Gently fold in the majority of the chocolate chips, reserving about 1/4 cup for topping.
  6. Scrape the thick dough mixture into the prepared pan. Use the back of the spatula or lightly floured hands to press the dough evenly into all four corners.
  7. Sprinkle the reserved chocolate chips over the top surface. Bake for 25 to 30 minutes. The edges should be lightly golden brown, but the very centre should still look slightly soft and glossy.
  8. Remove the pan from the oven and place it on a wire rack. Allow the bars to cool completely in the pan—at least 30 minutes, ideally an hour. This step is essential for setting the texture and making cutting clean.
  9. Once fully cooled, use the parchment paper overhang to lift the entire slab out of the pan, place on a cutting board, and cut into 16 uniform squares.