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Ultimate 3-Ingredient Customizable Cake Mix Cookie Bars

A stack of thick, chewy chocolate chip cake mix cookie bars with melted chocolate swirls.

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Make these super easy and chewy cookie bars using just three base ingredients and your favorite cake mix flavor. They bake quickly and are perfect for any gathering.

Ingredients

Scale
  • 1 box (15.25 oz) cake mix (any flavor)
  • 2 large eggs
  • 1/2 cup vegetable oil (or melted butter)
  • 1 cup mix-ins (chocolate chips, M&Ms, nuts, etc.)

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, combine the dry cake mix, eggs, and vegetable oil. Mix until just combined. Do not overmix.
  3. Fold in your chosen mix-ins, like chocolate chips or peanut butter chips.
  4. Press the dough evenly into the prepared baking pan.
  5. Bake for 18 to 22 minutes, or until the edges are lightly golden and a toothpick inserted near the center comes out with moist crumbs attached.
  6. Let the bars cool completely in the pan before lifting them out using the parchment paper overhang.
  7. Cut into squares. These bars are great for meal planning ahead of time.

Notes

  • For a richer flavor, substitute the oil with melted butter.
  • If you are looking for alternatives to traditional baking, consider how meal delivery companies simplify weeknight meals.
  • To make these bars extra gooey, add 1/2 cup of pudding mix to the dry ingredients.
  • These bars freeze well for up to three months.

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