Brownie Chocolate Chip Cookie Bars

These Brownie Chocolate Chip Cookie Bars are the best of both worlds: A perfectly fudgey brownie base and a chewy, chocolate chip studded cookie top layer. Crispy, chewy, indulgent and everything I want in a cookie bar recipe!

A brownie chocolate chip cookie bar that is absolutely epic.

Brownie Chocolate Chip Cookie Bars

Yep, I did it. I used a box mix of brownies and layered them with homemade chocolate chip cookie dough. Decadent and delicious cookie bars, I make no apologies about taking a short cut in the kitchen.

This is an older (and much loved) recipe that I posted years ago and it was in need of some much love: New pictures updated recipe instructions, and a spotlight up front and center!

All the ingredients for making brownie chocolate chip cookie bars. A boxed brownie mix and homemade chocolate chip cookie dough form to make the most delicious cookie bars.

High Altitude Cookie Bars

While I love baking (and eating) chocolate chip cookies, I often find myself short on time and want something easier. Cookie bars are always my answer. Reliable and not fussy, cookie bars are quickly becoming my go to whenever I’m in need of a quick dessert. This particular high altitude approved recipe is beloved by all and it’s no surprise why.

Brownie batter layered with chocolate chip cookie dough come together to make a decadent and easy-peasy cookie bar!

After par baking the brownies I add clumps of chocolate chip cookie dough and then bake into a delicious hybrid bar.

Crownie or Brookie?

Brownie + Cookie: Is it a crownie or a brookie?

I personally like to call them crownies but either will suffice. 🙂

It doesn’t really matter what you choose to call them. The bars are oooey gooey, chocolatey, perfect little squares of love.

Cut up cookie brownie bars cooling a baking rack. A brownie base and a chocolate chip cookie top.

Boxed Brownie Mix vs Homemade Brownies

If you have a homemade brownie recipe that you love then by all means GO FOR IT! Personally, I just really love the taste and texture of a boxed brownie mix. Especially in this recipe. My mom used to buy the 3-pack of Ghiradelli brownie mix at Costco when I was a kid and they’re still one of my favorites to this day. You do you. Make homemade brownies is you’d like but know that I’ll be over here rocking the boxed mix all day long.

I do add a bit of vanilla and espresso powder to the brownie mix to jazz it up just a wee bit.

A cookie try with three brownie cookie bars: A fudgy brownie bottom and a chewy chocolate chip cookie top. Sprinkled with salt.

Other Bar Recipes You Mike Like!

Because I’ve professed my love for the cookie bar and all bar recipes for that matter, here are some of my favorites!

Ginger Molasses Cookie Bars
Chocolate Chunk Espresso Blondies
Lunch Lady Brownies
Classic Chocolate Chip Cookie Bars

Holding a cookie brownie bar. Brownie bottom, chocolate chip cookie bars.

recipe by Mountain Mama Cooks, photos by Deborah DeKoff

As always, thanks for being here and reading through! I hope you enjoy the recipe. Happy Baking!! xo, Kelley


Brownie Chocolate Chip Cookie Bars

  • Author: Kelley


For the cookie layer:

  • 1 1/4 cups all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 1/2 cup (1 stick) room temperature butter
  • 1/4 cup + 2 tablespoons granulated sugar
  • 1/2 cup brown sugar
  • 1 egg
  • 1 teaspoon pure vanilla extract
  • 1 cup chocolate chips or chocolate chunks

For the brownie layer:

  • 118 oz. box brownie mix + ingredients for making brownies
  • 1 teaspoon pure vanilla extract
  • 1 teaspoon espresso powder
  • 1 teaspoon Maldon or other flakey sea salt, optional


  1. Preheat oven to 350 F degrees.
  2. Mix flour, baking soda and kosher salt in medium bowl; set aside.
  3. Beat butter, granulated sugar and brown sugar in large bowl with electric mixer on medium speed until light and fluffy. Add egg and vanilla; mix well.
  4. Gradually mix in flour mixture on low speed. Stir in chocolate chips; set aside.
  5. Prepare brownie mix as directed on package, adding  vanilla extract and espresso powder.
  6. Prepare a 13×9-inch baking pan with either butter and flour or use a baking spray with flour.
  7. Spread brownie batter into prepared pan and  bake 15 minutes.
  8. Remove brownies from oven and drop the cookie dough by the tablespoon full onto the partially baked brownie, covering the top evenly. It doesn’t need to be perfect as the cookie dough will spread during baking.
  9. Sprinkle the cookie dough with sea salt. Bake 20 to 25 minutes longer or until cookie top is golden brown.
  10. Remove pan from oven and cool in pan on wire rack until completely cool. Cut into into bars and devour.