I bake these Easy Cake Mix Cookie Bars when you and I want ultra-gooey, bakery-style cookie bars loaded with chocolate but only have time for a quick, one-bowl dessert. You grab a box of yellow cake mix, stir in eggs, oil, and a trio of dark, milk, and white chocolate chips, press everything into a 9×13 pan, and pull out thick, melty cookie bars that look like over-the-top bakery blondies.
Why you’ll love these bars
These are true “lazy baker” cookie bars: instead of measuring flour, sugar, and leaveners, you let the cake mix do the heavy lifting and focus on loading them with chocolate. The result is a soft, chewy bar with crisp edges and a gooey center that’s perfect for potlucks, bake sales, birthday parties, after-school snacks, or a last‑minute weeknight dessert. Because you’re using a standard 9×13 pan, you get a big batch in under 30 minutes—ideal for feeding a crowd.
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