Oreo Cookie Bars!

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Chocolate Oreo Cookie Traybake.. Seriously What Could Be Better than some Oreo Cookie Bars?!

So I thought that maybe using some of my (what feels like) 100 packets of Oreo’s in my cupboard would be a good idea for a recipe. I recently moved house, and when it came to packing all of my ingredients up from my Mum’s house and bringing them to my new house, I nearly had a box just dedicated to Oreos.

A lovely friend of mine sent me some after her Trip to America which you can partially see in the pictures.. but if we’re being completely honest, all of those Oreos have been eaten because they are the AMAZING American flavours that you can’t necessarily buy here, and the packets are there just for photos. (If you are a blogger you’ll see where I’m coming from..)

After the successes of my M&M Cookie Bars, and Rolo Cookie Bars, I thought I would do something similar, so the Oreo Cookie Bars happened. HOWEVER… I knew that if I just did a cookie mixture, with some Oreos, it would be too dry. This meant I needed something Chocolatey! I had coincidentally been given one of the ‘Cadbury’s Big Bars’ for Christmas and it was the Oreo one, and this just seemed to ideal to miss it.

The actual Oreo part of it is different to regular Oreos, but you also have the chocolate you need in a cookie. You can easily buy Cadburys Oreo bars now, so you don’t even need the Big Bar one that I used, just the amount of chocolate, and some regular Oreos to put on top and decorate with and give it a bit more Oreo oomph.

I do have several Oreo recipes already on my blog such as my Oreo CupcakesStrawberry Oreo Fudge, No-Bake Oreo Cheesecake and more. I know you all love Oreos like me. Well, not all of you do, but a large percentage do! I will admit that Oreos don’t always stay as my favourite biscuit, I adore others like Custard Creams, or even the classic Digestive.. but Oreos are just more popular on the internet!

I will admit that I did gobble a lot of these up myself, no sharing… but when I made them again my Trusty Taste Testers did also enjoy them. I did make a slight error when I first made these though as because I have a brand new oven, its very very hot, and the perfect temperature it should be, but I underestimated this, and baked mine for 30 minutes (as my Rolo Cookie Bars require 25-30minutes) and forgetting that these would naturally be drier compared to lots of caramel chocolates, mine were a little overdone… perfectly delicious when microwaved though. So, the second and third times I made these, mine required about 22-23 minutes to be perfect. Therefore, keep an eye on them. The smaller the amount of time, the gooier they will be! Enjoy!

Oreo Cookie Bars!

Chocolate Oreo Cookie Traybake.. Seriously What Could Be Better than some Oreo Cookie Bars?!
5 from 5 votes
Print Pin Rate
Category: Cookies
Type: Cookie Bars
Keyword: Oreos
Prep Time: 10 minutes
Cook Time: 20 minutes
Total Time: 30 minutes
Servings: 16 Pieces
Author: Jane's Patisserie


  • 275 g Plain Flour
  • 1 tsp Bicarbonate of Soda
  • 1/2 tsp Salt
  • 1 tbsp Cornflour
  • 115 g Unsalted Butter/Stork
  • 55 g Granulated Sugar
  • 135 g Light Brown Sugar
  • 1 Medium Egg
  • 1/2 tsp Vanilla Extract
  • 300 g Cadbury's Oreo Chocolate (chopped)
  • 8-10 Oreos (chopped)


  • Preheat your oven to 190C/170C Fan and line a 9x9inch Square Tin with parchment paper, and leave to the side for now.
  • Whisk/Mix the Plain Flour, Bicarbonate, Salt and Cornflour together so its evenly distributed – leave to the side.
  • In a larger bowl, melt the butter. Add in the two sugars, and whisk for about 2 minutes so the sugar starts to dissolve and the mixture is smooth. Add in the Egg and the Vanilla, and whisk again briefly till smooth. (I used an electric whisk)
  • Add in the Dry Ingredients and chopped up Cadburys Oreo Bar and mix with a spatula till a thick cookie dough is formed.
  • Press the mixture into the bottom of the tin and press in the chopped Oreos onto of the traybake. Bake the traybake in the oven for 20-25 minutes, until the top of the cookie bake looks ‘dry’!
  • Leave the cookie bake to cool for about 10 minutes, then leave to cool fully on a wire rack. Cut the bake into 4×4 for decent sizes, or 5×5 for smaller ones! Enjoy!


  • Because this traybake is essentially dryer compared to the Rolo Cookie Bars they will take less time in the oven. Also, the might look slightly underdone, but go by your instinct.
  • I baked mine for 25 minutes, and they still looked slightly squishy, but because my oven is brand new its VERY hot so mine could have done with only 20 minutes!
  • These delicious beings will last in an airtight container for up to 5 days, but honestly, they’ll be eaten before then.
  • I’ve never personally tried this mix as an actual cookie, but if you try it out, let me know how you get on – I’d love to know if it worked!
Nutrition Facts
Oreo Cookie Bars!
Amount Per Serving
Calories 193 Calories from Fat 63
% Daily Value*
Fat 7g11%
Saturated Fat 4g25%
Cholesterol 25mg8%
Sodium 186mg8%
Potassium 46mg1%
Carbohydrates 29g10%
Sugar 14g16%
Protein 2g4%
Vitamin A 195IU4%
Calcium 14mg1%
Iron 1.4mg8%
* These are only estimates and can vary dependant on brands of ingredients and serving sizes.


Find my other Oreo & Traybake Recipes on my Recipes Page!

You can find me on:

J x

© Jane’s Patisserie. All images & content are copyright protected. Do not use my images without prior permission. If you want to republish this recipe, please re-write the recipe in your own words and credit me, or link back to this post for the recipe.

About Author

Hiya! I'm Jane, and I adore baking, cooking and all things delicious. I'm also partial to homewares, lifestyle posts and more!


  • Jennifer
    August 19, 2020 at 7:33 pm

    Could these be turned into normal round cookies rather than slabs?

  • Holly
    July 23, 2020 at 11:05 am

    Hello 🙂
    Do you think I could replace the Oreo bar for white chocolate chips and the Oreo biscuits to Biscoff biscuits and then add dollops of the spread that this would work? Or would you recommend freezing balls of Biscoff and putting it into the tray of cookie dough like you would a rolled cookie? Thank you! Xxx

  • Jo
    July 20, 2020 at 4:56 pm

    5 stars
    Have you tried jammie dodger cookie bars? Thinking of replacing the oreos with dodgers and using white chocolate chips instead of the oreo bar?

    • Jane's Patisserie
      July 20, 2020 at 7:15 pm

      Yes I have! I have a blog post coming about them eventually, but it does work! x

    • Jo
      July 21, 2020 at 2:59 pm

      Oooooh thank you!

  • Amanda
    July 9, 2020 at 9:22 pm

    5 stars
    These were delicious! I cooked them in my fan oven for 20 minutes and they did look dry so took them out and when I eventually cut them they were quite gooey so maybe I could have cooked them for a minute or two longer if you didn’t want them to be too gooey.

  • claire
    June 19, 2020 at 3:23 pm

    5 stars
    These taste amazing! Your baking has kept me going through lockdown. We’ve made a lot of them. Thank you so much for this recipe.

  • Jessica
    May 29, 2020 at 2:53 pm

    Could you use white chocolate Oreo bar for this?

  • Kelly
    May 28, 2020 at 7:41 pm

    5 stars
    I made these today. I have to say they are one of my fave bakes to make. They are to die for. I love using your recipes, they never fail and are always yum!
    I baked for 20mins and they came out soft and gooey in the middle, not at all dry.
    Thanks for sharing your recipe 😊

    • Jane's Patisserie
      May 29, 2020 at 2:06 pm

      Ahhh yay! So so glad you liked the recipe!!

  • Ilaria
    May 22, 2020 at 8:20 pm

    This recipe is delish! I made it today and left it in the oven for 25 minutes when I took it out it was dry however still a little wobbly I was worried it would be raw so I left it in for literally 4 extra minutes once I cut into them it was dry but chewy when I tried them., but still had a nice taste! Should I have taken it out at 25minutes?

    • Jane's Patisserie
      May 22, 2020 at 8:36 pm

      Hiya – yes so these continue to bake whilst cooling. They definitely don’t need longer! I often even bake for 20 minutes because once cooled they’re epic and gooey! X

  • Paul Fishwick
    May 16, 2018 at 9:26 pm

    OMG, I absolutely love this recipe. I have tried a few things from this site before and they’re generally delicious (although I found the rolo fudge a bit too sweet for me) but this is by far my favourite.
    I thought I’d messed it up, leaving the butter melting in a pan and coming back to it bubbling away, but I just took it a lil bit further and effectively used brown butter for this. Delicious
    Thank you

    • Jess
      June 1, 2020 at 6:51 pm

      5 stars
      Can we freeze these? 🙂

    • Jane's Patisserie
      June 2, 2020 at 11:42 am

      Hey! Yes you can!

  • Aileen Waitaaga Kimuhu
    May 3, 2017 at 11:57 pm

    I tried this. First time, my oven was too hot and it ended up drying out the cookie bars. But the second time, it only took about 17 minutes to cook cause my oven was so hot. But they are delicious and gooey. Thank you for your brain! God Bless xx

    • Jane's Patisserie
      May 4, 2017 at 11:17 am

      Hiya! Ah yes, often its hard to find the perfect temperature as everyones ovens are different, but I am so so glad you found it!! Thank you! xx

  • Shal
    January 27, 2017 at 2:08 pm

    This looks absolutely delicious. xx

  • Claudia
    January 9, 2017 at 3:30 pm

    OMG these look absolutely incredible! I’m definitely going to have to give them a go one weekend! Although not sure I can wait until then!

    Claudia //


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