Published By Becky Excell - Posts may contain affiliate links - Oven Temperature Conversion Guide
Baking Dairy-free Recipes Low FODMAP Recipes Recipes Vegan

Gluten-free Oreo Cookie ‘Slutty’ Brownies Recipe (low FODMAP/dairy-free/vegan option)

Gluten-free Oreo cookie ‘slutty’ brownies recipe – excuse the name, I didn’t make it up myself! ? But after one bite,  you might understand why people call them that!

Gluten-free Oreo cookie ‘slutty’ brownies recipe? What on Earth even is it?! Well, it’s a cookie layer, topped with gluten-free Oreos, finished with a gooey, fudgy brownie layer. I know, sounds crazy, right?!

Gluten-free Oreo Cookie 'Slutty' Brownies Recipe (low FODMAP/dairy-free/vegan option)

What do you get when you cross a cookie with a brownie? (no, this isn’t a Dad joke with a cheesy punchline ?) The answer is my gluten-free Oreo cookie ‘slutty’ brownies recipe!

You’ll have to excuse me if you find the name slightly odd or offensive – I didn’t name these, the Internet did! I just wanted to recreate my own version of them that’s totally gluten-free.

I absolutely had to make these because being gluten-free often means missing out on all of the ‘good stuff’. And to be honest, that’s what inspired me to start my blog in the first place – I wanted to recreate all the things I could NEVER ordinarily eat.

And since I already have a gluten-free cookie bar recipe AND a gluten-free brownie recipe, this was a simple case of combining the two with a layer of gluten-free Oreos in the middle.

Easy peasy! And you know what? The cookie/brownie/Oreo combo is AMAZING and you 100% have to try these at least once in your life!

What are ‘slutty’ brownies?

  • Good question! As you may have read, it’s a layer of Oreos sandwiched between a cookie base and a brownie top.
  • Why are they called slutty brownies? Well, the original creator simply called them ‘Cookie Dough Oreo Brownies‘ (original recipe isn’t gf!) but when they went viral, the Internet gave them a new name… ‘slutty brownies’. I’m assuming that’s because they’re so OTT!
  • The original recipe was made using a shop-bought brownie mix. You’re welcome to do the same with a gluten-free brownie mix for ease, but trust me, you NEED to try it my way first!
  • They’re quite simply one of the most indulgent brownies you’ll ever find, but best of all, you’d never know mine were gluten-free AT ALL.

Gluten-free Oreo Cookie 'Slutty' Brownies Recipe (low FODMAP/dairy-free/vegan option)

So what do they taste like? They taste like coming home after a tough day, putting on your pyjamas, sticking something trashy on the TV and falling asleep on the sofa.

(I’m talking about comfort food, not just being lazy by the way ?)

If you’d prefer me to describe them in a more literal sense, then here you go: the bottom cookie layer is crisp on the outside, with soft cookie dough middle, packed with milk and white choc chips. 

On top of that is a layer of gluten-free Oreos, massively softened and gooey thanks to both decadent layers above and below it. Lastly, the brownie layer on top is gooey, fudgy and crisp on top, packed with *even more* choc chips.

If you’ve never tried one before, then now’s your chance – nobody can eat these without either saying ‘wow’ or ‘omg’ after the first bite. And I can definitely see why! Here’s everything you’ll need for them:

Gluten-free Oreo cookie ‘slutty’ brownies recipe: Ingredients

For the cookie bar base

  • 130g butter, melted (or dairy free alternative)
  • 50g caster sugar
  • 150g light brown sugar
  • 1 large egg (egg replacer if necessary)
  • 1 tsp vanilla extract
  • 280g gluten free plain flour
  • 1/4 tsp xanthan gum
  • 1 tsp bicarbonate of soda
  • 1 tbsp cornflour (also known as corn starch)
  • 150g chocolate chips (dairy free if necessary)

For the brownie top

  • 50g gluten-free plain flour
  • 25g cocoa powder (ensure dairy free if needed)
  • 125g butter (or dairy free alternative)
  • 125g chocolate, I use half dark and half milk (dairy free if necessary)
  • 2 medium eggs (egg replacer if necessary)
  • 140g caster sugar
  • 60g chocolate chips (optional – dairy free if necessary)

For the centre

  • 1-2 packs of gluten free Oreos

Looking for the full recipe, including the method? Keep scrolling down until you see the recipe card ?? See the FAQ section below on how to adapt this to be dairy-free, vegan or low FODMAP.

Gluten-free Oreo Cookie 'Slutty' Brownies Recipe (low FODMAP/dairy-free/vegan option)

So I thought I’d kick things off with a little frequently asked questions section – if you just want the recipe, then keep scrolling.

But I’ve thrown in some tips here that will be really helpful if this is your first time baking this, or you want to adapt it. So here they are!

Gluten-free Oreo cookie ‘slutty’ brownies recipe: Frequently asked questions

Can I make this recipe gluten free? Is it suitable for Coeliacs?

It is gluten free, though nobody would know just by tasting it – trust me!

Bear in mind that minimising cross-contamination is hugely important if you’re Coeliac or making this for someone who is. Here’s some tips from Coeliac UK on minimising the risk of cross contamination:

Also, make sure that all ingredients used don’t have any gluten-containing ingredients. Then make that that they also don’t have a ‘may contain’ warning for gluten, wheat, rye, barley, oats (which aren’t gf), spelt and khorasan wheat (aka Kamut).

Here’s some more info from Coeliac UK on identifying safe gluten free products.

Can I make your gluten-free Oreo cookie ‘slutty’ brownies recipe dairy free?

Yes, you can with a few simple swaps!

First of all, use dairy free chocolate and chocolate chips, if optionally using. I prefer to use a dark chocolate that’s naturally dairy-free (no ‘may contain) over specifically dairy-free chocolate. Ensure that your cocoa powder is dairy-free too.

Instead of butter, use a dairy-free baking block, like Stork hard margarine. Or, any kind of hard dairy-free alternative to butter.

Lastly, ensure that your gluten-free Oreos are dairy-free too. Most are, but just double-check for me first. That’s it!

Can I make your gluten-free Oreo cookie ‘slutty’ brownies vegan?

Yep! If you follow the instructions above to make this recipe dairy free, then all you’ve got left to contend with is the eggs.

Here’s a few ideas you can use as egg replacements, so each of these = 1 egg.

  • 3 tablespoons of aquafaba – water from a can of chickpeas. Keep the chickpeas for a future dinner!
  • Egg replacement powder – I’d recommend using Orgran as it’s gluten free.
  • 1 tablespoon of chia/flax seeds mixed with 2 tablespoons of water and left for 10 minutes in the fridge.
  • 3 tablespoons of applesauce.

I haven’t tested all of these egg alternatives so let me know how you get on in the comments below ?? Ensure that your gluten-free Oreos are vegan too – most are fortunately!

Can I make this recipe low FODMAP?

By ensuring that all your chocolate/chocolate chips are lactose-free, then you can easily make this recipe low FODMAP. Whilst no gluten-free Oreos are ‘officially’ low FODMAP, the ones I use don’t appear to contain any high FODMAP ingredients.

Is your gluten-free Oreo cookie ‘slutty’ brownies recipe nut free?

Yep, this is a nut-free recipe as far as ingredients go, BUT make sure you check the ingredients label on ALL the products you use just to be safe.

Even if the products don’t contain nuts, they may have a ‘may contain nuts’ warning due to being produced in a factory that handles nuts.

You can never be too careful so always read the labels on everything first. Please be extra careful when choosing your gluten-free Oreos too – these ones from Tesco have a ‘may contain’ warning for nuts.

However, these ones from Morrisons don’t. Double check all the ingredients before buying as you never know when these things may change!

Where can I find gluten-free Oreos?

Fortunately, there are a ton of different supermarket own-brand gluten-free ‘Oreos’ out there down free from aisles. Here’s a quick rundown:

Tesco, Asda (and Sainsburys which seems to be out of stock so I didn’t link it) all seem to be the exact same product. They’re dairy-free and vegan even though they don’t shout about it, but they do contain oats.

Morrisons version seems to be the only one that’s nut-free (please check ingredients to ensure this is still correct) and it doesn’t contain oats either.

Lastly, Schar’s version is purely gluten-free and contains milk, but it doesn’t contain oats. Pick whichever one suits you!

Can I make your gluten-free Oreo cookie ‘slutty’ brownies in a food processor or standing mixer?

I’d recommend avoiding a food processor to make this as it’s a little overkill for this recipe.

The cookie dough doesn’t need excessive mixing and for the brownie, we more want more of a whisking effect, which a food processor can’t really provide.

So you’re probably better off with a hand whisk, electric whisk or stand mixer with the whisk attachment for this recipe.

Can I make your gluten-free Oreo cookie ‘slutty’ brownies recipe by hand?

You can of course, bake this without any assistance from any appliance – just a good ol’ fashioned silicone spatula will do. Just make sure you give it a lot of welly, otherwise your mixture won’t be consistent and might not bake properly.

If making it by hand, please refer to the recipe video on this post so you can see the consistency you need to achieve before moving on to the next steps.

Do I need any special equipment to bake your gluten-free Oreo cookie ‘slutty’ brownies recipe?

As I mentioned, you can easily make this entire recipe by hand, so you certainly don’t need any crazy appliances or anything like that.

What you will need however is a 9″ square baking tin – here’s the one I use. Apart from that, you’ll just need a little baking paper too!

Does this recipe need xanthan gum?

You’ll see xanthan gum in a lot of my recipes as it’s an essential ingredient in gluten free baking.

There is a little in the cookie dough base, but if you can’t tolerate xanthan gum, or you don’t have any, it would be fine to omit from this recipe.

Can I make this recipe using other gluten free flours like buckwheat flour or coconut flour?

There’s a big difference between ‘gluten free plain/self-raising flour’ and a *singular* type gluten free flour. When I say ‘gluten free plain or self-raising flour’ in a recipe, I mean a BLEND of gluten free flours, not just one, singular flour.

Most gluten free flour you buy in the supermarket typically contains a blend of rice flour, potato flour, maize flour, tapioca flour AND buckwheat flour. That’s a lot of different flours!

In gluten free self-raising flour, there’s usually even a little baking powder and xanthan gum in it too which always helps. So to replace it with just one specific type of flour… that’s not going to cut it at all. Definitely go for a gluten free flour blend.

Do I need weighing scales to bake your gluten-free Oreo cookie ‘slutty’ brownies?

In short… yes, yes and yes! And I wouldn’t advise attempting any my recipes without them.

A lot of work went into fine tuning ratios and quantities and for me, baking is all about consistency and precision. I want you to make this recipe and for it to turn out EXACTLY like mine did.

For example, adding too much flour can make things dry and crumbly, whereas not adding enough sugar means it’ll lose its crisp exterior. I don’t want you to be disappointed, so please weigh your ingredients!

I’d recommending using digital cooking scales like these so you know you’re getting an accurate measurement and replicating my recipe as accurately as poss.

Can I bake your gluten-free Oreo cookie ‘slutty’ brownies recipe with less sugar / without sugar?

As always, I advise removing/lowering sugar at your own risk because sugar isn’t just for sweetness – it’s integral to the structure of your creation, once baked.

And especially as this is such an OTT, indulgent treat, I think that trying to make a lower sugar version is definitely a losing battle!!

I’d recommend making something a little more down to Earth, like my gluten-free choc chip banana bars which have no added sugar at all.

How long can I keep your gluten-free Oreo cookie ‘slutty’ brownies for?

In an airtight container, they should last up to 4-5 days. When they start getting a little dry, they’re probably past their best.

Can I freeze your gluten-free Oreo cookie ‘slutty’ brownies?

Yep! You can freeze them for up to 2-3 months without a problem – just make sure you put it in an airtight plastic container.

It’s probably a good idea to slice it all first so you can defrost a slice at a time.

A single slice should take around 4-5 hours to thaw at room temperature.

How can I tell when my gluten-free Oreo cookie ‘slutty’ brownies

are done?

Grab a skewer and give it a poke in the centre. If it comes out clean, then it’s done! You might get a little chocolatey residue on there, but that’s ok too.

You just don’t want tons of gooey chocolate coating your skewer, however. And definitely allow them to cool so they can firm up – they’ll be a lot ‘sloppier’ when they’re warm.

Can I print your gluten-free Oreo cookie ‘slutty’ brownies recipe?

Of course! Just hit the print button located on the recipe below ?? (otherwise you might end up printing this entire post which would probably make your printer go into early retirement)

Gluten-free Oreo cookie ‘slutty’ brownies recipe: Method

Ok, so here’s a printable version of my gluten-free Oreo cookie ‘slutty’ brownies recipe. Please remember to give it 5 stars if you tried it and enjoyed it as it helps people know it’s worth trying too! ⭐️ Feel free to leave your written reviews in the comments below this post.

Gluten-free Oreo Cookie 'Slutty' Brownies Recipe (dairy-free/vegan option)

Gluten-free Oreo cookie 'slutty' brownies recipe - with a cookie base, a layer of Oreos and a brownie top, these are the ULTIMATE treat! See the blog post above on how to adapt this to be dairy-free, vegan or low FODMAP.
Keyword dairy-free, gluten-free slutty brownies recipe, oreo cookie brownies recipe, vegan
Prep Time 30 minutes
Cook Time 35 minutes
Total Time 1 hour 5 minutes
Servings 12 -16
Calories 408kcal
Author Becky Excell


  • The only non-stick baking paper I trust!
  • My 9" square baking tin


For the cookie bar base

  • 130 g butter melted (or dairy free alternative)
  • 50 g caster sugar
  • 150 g light brown sugar
  • 1 large egg egg replacer if necessary
  • 1 tsp vanilla extract
  • 280 g gluten free plain flour
  • 1/4 tsp xanthan gum
  • 1 tsp bicarbonate of soda
  • 1 tbsp cornflour also known as corn starch
  • 150 g chocolate chips dairy free if necessary

For the brownie top

  • 50 g gluten-free plain flour
  • 25 g cocoa powder ensure dairy free if needed
  • 125 g butter or dairy free alternative
  • 125 g chocolate I use half dark and half milk (dairy free if necessary)
  • 2 medium eggs egg replacer if necessary
  • 140 g caster sugar
  • 60 g chocolate chips optional - dairy free if necessary

For the centre

  • 1-2 packs of gluten free Oreos


  • Prepare a 9x9 inch square tin with some non-stick baking paper.
  • Preheat your oven to 160C Fan / 180C.

For the cookie base

  • Start with your cookie base. Add your melted butter and both sugars to a large bowl and mix together. Do this until totally combined - it will take a few minutes with a spatula by hand. Let it sit briefly so that it stiffens up.
  • Add in your egg and vanilla extract and mix again until fully combined.
  • Add in your flour, xanthan gum, bicarbonate of soda, salt and cornflour and mix (I still do this by hand). It can take quite a bit of time to fully combine but you should be left with a yummy cookie dough!
  • Add in your chocolate chips and mix into the dough evenly.
  • Place your cookie dough into your prepared tin. I spoon mine in and push it to the edges making sure its an even layer without any gaps. (Get your hands in there if need be!)
  • Place this in the freezer for no less than 15 minutes whilst you make the brownie batter.

For the brownie top

  • Melt together your butter and chocolate in a microwave or over a bain marie until completely melted. Mix together and leave to cool down to just warm / room temp.
  • Sieve together your cocoa powder and gluten free flour in a bowl. Mix briefly until combined, put to one side.
  • In another bowl crack your eggs and pour in your caster sugar. Beat together (I use an electric hand whisk) until paler in colour and almost a little frothy.
  • Once the chocolate and butter mixture is cooled to room temp, pour it into your egg/sugar mixture. Fold it in with a spatula - it will initially marble and then turn super chocolatey.
  • Next fold in the your gluten free plain flour and cocoa powder mix. Ensure it's fully folded in.
  • Fold in your chocolate chips.

To assemble

  • Remove your cookie base from the freezer. Place gluten free oreos all over the cookie dough. Fill in the gaps with broken up bits of oreo too.
  • Pour / spoon over your brownie batter and smooth over so that it's even.
  • Sprinkle extra chocolate chips on top.
  • Place in the oven for around 35 - 40 minutes.
  • Allow to cool in the tin and then cut into squares and enjoy!


Thanks for reading all about my gluten-free Oreo cookie ‘slutty’ brownies recipe! If you make it, I’d love to see how it turned out so don’t forget to take a snap of your creations and tag me on Instagram!

Any questions about the recipe? Please do let me know by following me on Instagram and leaving me a comment on a recent photo!

Thanks for reading,

Becky xxx

Don’t forget to pin this for later!

Tap here to buy my first ever gluten-free recipe book!

You Might Also Like

Privacy policy.