Halloween Oreo Brownies

Name: Halloween Oreo Brownies
Prep time: 10 min
Cook time: 40 min
Total time: 410 min
Ingredients: 200 g 70% Cocoa dark chocolate ((7oz)); 180 g Butter ((¾ cup)); 250 g Caster sugar ((1+¼ cups)); 3 Medium Eggs; 1 Teaspoon Orange extract ((or vanilla extract)); 100 g Plain flour ((¾ cup)); 1 Tablespoon Cocoa powder; 100 g Milk chocolate chips ((½ cup)); 2 Packs Halloween Oreos ((308g/10.8oz))

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These Halloween Oreo brownies are thick, chewy and bursting with chocolate orange flavour. They're easy to make and get even better the longer you leave them in the fridge!

squares of halloween oreo brownies on a white worktop

If you're looking for an easy yet impressive bake to try this spooky season, these Halloween Oreo brownies are just the thing! They're super thick and fudgy, with a good hit of chocolate chips and festive Oreos in every bite.

If you've never made brownies before, you can find all of the information below to help you get them right on your first try. This includes detailed ingredient and equipment notes, step-by-step instructions, and top tips. I hope you find it helpful but if you'd prefer to skip to the condensed version of the recipe, scroll to the recipe card at the end of the post. Enjoy!

Ingredients

Here's everything you'll need to make this recipe...

Dark chocolate: For brownies, don't use low-quality chocolate. I used 70% dark chocolate but anything between 65 and 75% cocoa will work well. Chocolate with more cocoa than this will cause bitter brownies and chocolate with less will likely cause oily brownies.
Butter: Salted or unsalted, whatever you like.
Caster sugar: Also known as superfine sugar, this dissolves into the eggs a lot easier than regular granulated sugar.
Eggs: You'll need 3 medium eggs for this recipe. Make sure to whisk them really well with the sugar, which will help to form that crackly brownie crust.
Orange extract: I made my brownies chocolate orange flavoured to match the look of the Halloween Oreos but you can use vanilla extract if you prefer.
Plain flour: Or all-purpose flour. This will help to form structure while keeping your brownies thick and dense. Don't use self-raising flour unless you like cakey brownies.
Cocoa powder: Adding a small amount of cocoa powder will enhance the chocolate flavour without changing the texture of the brownie too much.
Chocolate Chips: A must for any good brownie! I used milk chocolate chips but you can use white or dark chocolate chips instead.
Halloween Oreos: The star of the show! I used 1 pack of Halloween Oreos in my brownie batter then most of a second pack on top.

Equipment

8x8 tin: Use this size of tin for perfectly thick, fudgy brownies. If you want to use a different size of tin, use my cake pan converter tool to adjust the ingredient quantities too.
Baking paper: This makes it easy to remove the brownies once they're set.
Saucepan: For melting the butter and chocolate together. You can also do this in a heatproof bowl in the microwave, but you'll need to take it out and stir it every 30 seconds to prevent burning or seizing.
Mixing bowl: A large one.
Electric whisk: Or a stand mixer, for whisking the sugar into the eggs. This takes a very long time to do properly by hand so I using recommend an electric whisk if you can.
Utensils: A wooden spoon, a teaspoon and tablespoon, and a sharp knife.

overhead image of halloween oreo brownies

How to make Halloween Oreo brownies

Step 1: Line an 8x8-inch tin with baking paper and preheat your oven to 160°C (or 140°C if you're using a fan oven).

Step 2: To a saucepan, add 200g of 70% dark chocolate and 180g butter. Place the pan over low heat on the stove and stir gently until the ingredients are fully melted. Remove it from the heat and set it aside to cool for 10 minutes.

Step 3: Add 3 medium eggs to a large bowl along with 250g of caster sugar and 1 teaspoon of orange extract. Use an electric whisk to whisk them all together for a few minutes until the mixture becomes voluminous, pale and silky.

Step 4: Pour the cooled chocolate mixture into the bowl then gently fold it into the eggy mixture. Once combined, fold in 100g of plain flour and 1 tablespoon of cocoa powder.

Step 5: Add 100g of milk chocolate chips to the batter along with 1 pack of crushed Halloween Oreos.

Step 6: Transfer the mixture to your lined tin and spread it evenly into place. Top with remaining extra Halloween Oreos and chocolate chips if desired.

placing oreos on top of brownie before baking

Step 7: Bake the brownies for 35-40 minutes. You'll know they're done when they've formed a crackly crust on top and are pulling away from the edges of the tin slightly.

Step 8: Let the brownies cool to room temperature then pop them in the fridge overnight. This is key to the chewy, fudgy texture! If you're pinched for time, 6 hours will do the trick but the longer you can chill them, the better.

Step 9: Once chilled, remove the brownies from the tin, cut them into slices and enjoy! I usually cut mine into 16 squares but if you're serving a large crowd, you can cut the squares in half to make 32 triangles.

Top tips

Use 70% cocoa dark chocolate for best results. Lower cocoa chocolate usually has more sugar in it, which will skew the final results.
Cool the chocolate mixture before adding it to the eggy mixture. If you add it while it's still hot, you risk scrambling the eggs.
Refrigerate the brownies overnight for the best texture. The fat needs lots of time to firm up to create that ultra fudgy texture.

FAQ

How long do Halloween Oreo brownies last?

These will keep well in an airtight container for up to 1 week, or up to 2 weeks if you don't put any Oreos on the top. Keep them in the fridge to maintain their chewy texture.

Can I freeze them?

Yes, these can be frozen for up to 1 month in an airtight container, or you can wrap the whole brownie slab up tightly in clingfilm. To defrost, just leave them in the fridge overnight. Do not refreeze.

Where can I buy Halloween Oreos?

I've found these in all of the main supermarkets near me and also in Home Bargains. I think they are quite new to the UK so it may take some time for them to get to a store near you.

Can I make this recipe dairy-free?

Yes, all you need to do is switch the butter out for a dairy-free alternative and use dark chocolate chips instead of milk chocolate chips. Halloween Oreos are dairy-free already so there are no other changes you need to make!

hand holding up 2 halloween oreo brownies

More Halloween desserts

I hope you have fun making these Halloween Oreo brownies! If you give them a go, please leave a rating or comment below to let me know what you think. Enjoy!