Brownie Batter Cookies with Mars Chocolate Bars

Whether you’re a brownie or cookie person, you can have both and you’ll love these chocolate-filled treats. These easy-to-make Brownie Batter Cookies use Mars Chocolate Bars for an indulging, delicious chewy goodness inside with a crunchy texture on the outside.

Today I’m sharing a delicious and indulging recipe. Believe me, you definitely want to try these mouthwatering Mars chocolate brownie cookies.

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Mars CHOCOLATE Bars Brownie Batter Cookies

I so am a brownie lover and a chocolate cookies monster, so adding both is absolute goodness!

What I love the most about these cookies is the chewy, brownie texture. They’re unbelievably soft and full of rich chocolate flavor. I promise you’re going to love them.

I saw a similar recipe a while ago at Recipe Girl and I loved it.  I used a few tips from different recipes and these turned out super yummy!

General videw of all the Brownie Batter Cookies with Mars Chocolate Bars

How to make Brownie Batter Cookies with Mars Chocolate Bars

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Ingredients:

  • Unsalted butter – at room temperature
  • White sugar
  • Semi-sweet chocolate chips
  • Espresso powder
  • Mars chocolate Bars – chopped.
  • Large eggs
  • All-purpose flour
  • Baking soda
  • Salt
  • Vanilla extract

Tools:

  • Wooden spoon or whisk
  • Cookie sheet
  • Wire Rack

Directions:

First of all pre-heat the oven to 350ºF {180ºC}

In a large bowl, put the butter and the chocolate chips and take them to the microwave for 2-3  minutes {depending on your microwave potency}. 

About half time stir and put it back.

It should be ready when it’s completely melted and smooth.

If you don’t have a microwave you can always go for “bain-marie or double bath” {hot water bath}. 

Then pour the sugar, salt, and vanilla into the melted chocolate mix and stir well.

Let it cool for a few minutes so it doesn’t cook the eggs.

Then start adding the eggs. These should be added one at a time mixing well until they are completely incorporated.

Then add the flour and baking soda and stir strongly with preferably a wooden spoon. It gets very hard so you have to put a lot into it.

Mix until the cookie dough is smooth and shiny – don’t overmix.

Lastly, add the mars bar chunks and mix.

On a prepared baking sheet with butter or parchment paper and place about a spoon per cookie.

Make sure to leave space (about 1-2 inches apart) so that when they grow, they don’t stick together.

Bake for about 10-12 minutes or until you see them slightly cracked and puffed up. 

Take them out so they still are soft and gooey. The key here is to slightly underbake them.

Let the cookies cool for a few minutes on the hot cookie sheet, then transfer them to a cooling rack.

That one on the left got the Mars chunk melted and came out, Oh my! Yummmm!

They will get thinner and a bit crunchier on the outside when they cool down but are still soft inside and with melted caramel from the Mars chocolate bars. 

Brownie Batter Cookies with Mars Chocolate Bars pilled up with one leaning on the side

I love eating them fresh right off the cookie sheet so they are still a bit warm and gooey…. drooling here!

Baking Tips

As with most brownies, the crucial step to making sure that your brownies are amazing and not ordinary is to slightly underbake them so that the centers are a bit gooey.

Use a size 40 cookie scoop and space the dough balls about 1-2 inches apart from each other. 

Don’t overbake the cookies since overbaking will make the centers less fudgy and drier.

I use and recommend semi-sweet chocolate, but you can use bittersweet or unsweetened chocolate for a much darker flavor.

Variations and alternatives

Instead of the Mars Chocolate bars, you can use Chocolate chips, white chocolate chips, peanut butter chips and even add in your favorite nuts.

Make Ahead, Storing, and Freezing

When cool store the cookies in an airtight container or Ziplock bag at room temperature for 4-5 days.

To freeze the dough, form it into balls and flash freeze until firm on a baking sheet. Transfer to an airtight container or Ziplock bag and freeze for up to 3 months. Let the dough thaw in the fridge and bake.

It’s delicious!!!!

What do you think???? Want to try?????

Frequently Asked Questions

Why are my cookies too thin?

While I haven’t had this happen to me, I can recommend letting the dough rest in the refrigerator for 30-40 minutes before scooping your cookies to prevent them from spreading too much.

Can you make cookies with brownie mix?

Yes, you definitely can! Follow along with most of the mix box instructions but you’ll need a little extra flour, a leavening agent, and a few other ingredients to turn brownie mix into cookies! 

How do I store these double chocolate brownie cookies?

I like to store these brownie batter cookies in an airtight container for 4-5 days. You can store them on the counter or in the fridge!

More Cookie Recipes to Try

If you like this Mars Chocolate Bar Brownie Batter Cookies recipe, you might also love these other delicious Sweet recipes too:

🥣 Recipe

Brownie Batter Cookies with Mars Chocolate Bars Recipe Piled up on a table

Brownie Batter Cookies with Mars Chocolate Bars

Camila Rojas
Whether you’re a brownie or cookie person, you can have both and you’ll love these chocolate-filled treats. These easy-to-make Brownie Batter Cookies use Mars Chocolate Bars for an indulging, delicious chewy goodness inside with a crunchy texture on the outside.
5 from 7 votes
Prep Time 10 mins
Cook Time 12 mins
Total Time 22 mins
Course Desserts
Cuisine Tradicional
Servings 18

Ingredients
  

  • 3.5 Oz of unsalted butter {100 gr}
  • ¾ cup of white sugar
  • ¾ cup of semi-sweet chocolate chips
  • 1 tbs espesso powder
  • 2 to 3 regular bars of Mars Bar chocolate chopped.
  • 2 large eggs
  • 3/4 cup of all purpose flour
  • 1 tsp of baking soda
  • ¼ tsp of salt
  • 1 tsp vanilla extract

Instructions
 

  • First of all pre-heat the oven to 350ºF {180ºC}
  • In a mixing bowl, put the butter and the chocolate chips and take them to the microwave for 2-3 minutes {depending on your microwave potency}.
  • About half time stir and put it back.
  • It should be ready when it’s completely melted and smooth.
  • If you don’t have a microwave you can always go for “bain-marie or double bath” {hot water bath}.
  • Then stir the sugar, salt, and vanilla and mix well.
  • Let it cool for a few minutes so it doesn’t cook the eggs.
  • Then start adding the eggs. These should be added one at a time mixing well until they are completely incorporated.
  • Then add the flour and baking soda and stir strongly with preferably a wooden spoon. It gets very hard so you have to put a lot into it.
  • Mix until the batter is smooth and shiny – don’t overmix.
  • Lastly, add the mars bar chunks and mix.
  • In a baking tray, spray some butter and place about a spoon per cooky.
  • Make sure to leave space so when they grow, they don’t stick together.
  • Bake for about 10-12 minutes or until you see them slightly cracked and puffed up.
  • Take them out so they still are soft and gooey. The key here is to slightly underbake them.
  • Let the cookies cool for a few minutes on the hot cookie sheet, then transfer them to a cooling rack.

Notes

They will get thinner and a bit crunchier on the outside when they cool down but are still soft inside and with melted caramel from the Mars chocolate bars.
I love eating them fresh right off the cookie sheet so they are still a bit warm and gooey…. drooling here!
Keyword brownie batter cookies, Brownie cookies, chocolate cookie, cookie recipe, Mars Bar Chocolate brownie cookie, Mars Bar recipe

These are some delicious Mars bar recipes from my favorite bloggers:

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11 Comments

  1. Way too runny for cookies! Put the mix into a pan and baking them now…hope they turn out as squares?

    1. The mix should be too runny but coming from a brownie batter base it’s not as stiff as regular cookies are. I was a bit scared of how these would come out but in the end, they turned out amazing and delicious. I ate I think the first 3 right out of the oven LOL.
      Hope yours turn out great!
      Hugs

  2. 5 stars
    Oh my yum! Chocolate and cookies? You had me at chocolate :) You will be a Fabulous Feature this week! I’m loving this recipe.

  3. 5 stars
    I love mars bars, they are one my favourite chocolate bars, these looks very yummy! I’ve chosen these to be one of my favourites at Sweet and Savoury Sunday, stop by grab a button and link up again this weekend!