Witches Brew Brownies

These Witches Brew Brownies are the perfect treat to use up leftover Halloween candy or to make because why not?!

I made these brownies using Reese’s Peanut Butter Cups, KitKats and M&Ms. I also added some edible eyes.

The great thing about these brownies is that you can customise them and include any sweet or chocolate you fancy. You could also leave them plain or maybe add some chocolate chips.

Reasons to Love This Recipe

These gooey, chewy, fudgy brownies are perfect for the chocolate lover in your life. They are thick, gooey and packed full of chocolate.

There are so many different options to customise these brownies. Check out the alternatives section below for some ideas.

What Are Brownies?

Brownies are a chocolate-based treat. They can either be fudgy or cakey depending on their density. Brownies can be customised by using things such as nuts, chocolate chips, flavourings, and chocolate sweets. Brownies were originally developed in the US at the end of the 19th century and became popular in the 20th century.

Before you Start Baking

Before you start baking I always find it easier to prepare the chocolate. I cut the Reese’s Peanut Butter Cups into halves and I left some whole. For the KitKats, I cut these into halves and quarters. I added the Peanut Butter Cups, KitKats and M&Ms to a bowl and left to one side.

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Another important step before you start baking is to preheat the oven. This ensures that the brownies bake at the proper temperature and for the correct amount of time.


To make the brownies start by adding the butter and chocolate to a bowl and melt in the microwave on 20-second bursts stirring in between each burst until completely smooth and melted.

I would recommend using dark chocolate rather than milk. Don’t worry if you don’t like the taste of dark chocolate. These brownies are rich but they don’t taste overwhelmingly like dark chocolate.

Once you have melted the butter and chocolate leave to one side. In a separate bowl add the eggs and sugar and whisk until doubled in size. I use the whisk attachment on my stand mixer but you could also use a hand mixer.

Once your eggs are sugar mixture has doubled in size fold through the chocolate and butter mixture. You want to be super careful while doing this so as not to knock the air out. I find the easiest way to do this is to go around the side of the bowl and fold the mixture in on itself.

It may feel like it is taking aggggges to fully incorporate the chocolate but keep going I promise it is worth it.

Next, add in the flour and cocoa powder and fold these through just as you did with the chocolate mixture.

Finally, fold through your chocolate and pour the mixture into your brownie tin.

Bake in the oven for 30-35 minutes.

How Do I Know My Brownies are Baked?

It can be quite difficult to tell when your brownies are ready. You want the brownies to have a very slight wobble when you bring them out of the oven.

If your brownies are more cake-like then you have overbaked them. Just bake them for slightly less next time.

I wouldn’t recommend using a cake tester as you want the brownies to be gooey so a cake skewer would come out with batter on it.

Leave the brownies to cool in the tin for 15-20 minutes before transferring them to a wire rack to cool completely.


Once your brownies have cooled completely, melt the chocolate in the microwave on 20-second bursts stirring in between each burst until they are completely melted and smooth.

Pop this into a piping bag with either a small round nozzle or if you are using disposable piping bags snip the top of the bag off and drizzle over the top of the brownies.

Decorate using leftover Halloween candy or your favourite chocolate.


Why not add a teaspoon of flavourings like salted caramel or peppermint.

You could also add in some nuts instead of chocolate chips in the recipe. Or why not add some caramel or Biscoff spread.

You can also add in any chocolates you want or just add some chocolate chips.


Brownie Tin

Mixing Bowls



Piping Bag

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If you do have any questions about these Witches Brew Brownies or any other recipes on my blog you can contact me either by sending me a DM on social media or an email. You can find all my details on the right-hand side of this page. 

Witches Brew Brownies

Sarah Mark
These Witches Brew Brownies are the perfect treat to use up leftover Halloween candy or to make because why not?!
5 from 3 votes
Prep Time 30 mins
Cook Time 35 mins
Decoration 20 mins
Total Time 1 hr 25 mins
Servings 12 Servings


For the Brownies

  • 225 g Unsalted Butter or Stork
  • 225 g Dark Chocolate
  • 4 Large Eggs
  • 300 g Light Brown Sugar
  • 1 tsp Vanilla Extract
  • 175 g Plain Flour
  • 59 g Cocoa Powder
  • 100 g Chocolate Chips
  • 75 g Reeses Peanut Butter Cups
  • 75 g M&Ms
  • 50 g KitKats

For the Decoration

  • 200 g Milk Chocolate
  • Leftover Chocolate
  • Edible Eyes


Beofre Bakign

  • Cut the KtiKats and Reeses Peanut Butter Cups into halves and quarters and leave to one side.
  • Preheat the oven to 180C (160C Fan) and line a brownie tin with baking paper.

To Make the Brownies

  • Put the chocolate and butter into a large bowl and melt in the microwave on 20-second bursts stirring in between each burst until completley melted and smooth. Leave to one side.
  • In a seperate bowl whis the eggs and sugar together until they have doubled in volume.
  • Pour the chocolate mixture and vanilla into the egg mixture and fold together. You need to be gentle during the stage because you don’t want to knock all the air out of your eggs.
  • Add in the flour, cocoa powder and fold again until they are all completely incorporated
  • Finally, add the chocolate chips and other chocolates and fold through until they are evenly distributed.
  • Pour the mixture into your brownie tin and bake in the oven for 30-35 minutes. You will know they are ready because they will have a slight wobble
  • Leave to cool in the tin for 15-20 minutes before moving to a wire rack to cool completley.

To Decorate

  • Once the brownies are completely cooled melt the milk chocolate in a heatproof bowl in the microwave in 20 second bursts until completely melted.
  • Put the melted chocolate into a piping bag and drizzle over the top of the brownies.
  • Deccorate using leftover chocolate and some edible eyes.


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