Name: 4 Ingredient Chocolate Bourbon Biscuit Cake Recipe
Prep time: 15 min
Cook time: 20 min
Total time: 1 h 5 min
Yield: 10
Cuisine: Scottish
Ingredients: 150ml double cream (2/3 cup); 175g dark chocolate chips (1 cup); OR 300g melted Nutella (1 cup); Extra bourbon biscuits to decorate (optional); 450g bourbon biscuits (3 ¾ cups); 350ml whole milk (1 ½ cups); 2 tbsp self-raising flour; 1 tbsp caster sugar

This four-ingredient Bourbon Biscuit Cake is SO simple but will definitely impress! You might be wondering how it’s possible to make a four-ingredient chocolate cake and bake it for just 20 minutes, but trust us, it’s easy AND delicious. And it’s full of Bourbon Biscuits!

4 Ingredient Bourbon Biscuit Cake Recipe on a plate

Bourbon Biscuits are a sandwich biscuit made of two dark chocolate rectangular biscuits with a chocolate buttercream in-between. They’re really moreish, and make a great accompaniment to a cup of tea! In fact, they’re one of the top three biscuits consumed in the UK!

Bourbon Biscuits are a British classic, although they were actually invented by a German named Hans Zehnloch. The name has nothing to do with the drink but instead comes from a combination of where they were invented – BOURnville, and the inventor’s hometown of BONN. They also have 10 holes because his last name, Zehnloch, literally means ’10 holes’.

4 Ingredient Bourbon Biscuit Cake Recipe slice on a plate with fork

In any case, we’ve taken these biscuits that were created in 1910 and reinvented them into a delicious chocolate cake. And we don’t just mean the flavour, we mean that this cake recipe is mostly made up of Bourbon Biscuits! How you might wonder? Read on and see!

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4 Ingredient Bourbon Biscuit Cake Recipe Pin

Things you’ll need to make Bourbon Biscuit Cake

7” loose bottom cake tin
Food processor or blender that can break down the biscuits to fine crumbs
Large mixing bowl

Ingredients for Bourbon Biscuit Cake

Yield: 10 slices

For the cake:

450g bourbon biscuits (3 ¾ cups)
350ml whole milk (1 ½ cups)
2 tbsp self-raising flour
1 tbsp caster sugar

For the topping:

150ml double cream (2/3 cup)
175g dark chocolate chips (1 cup)
OR 300g melted Nutella (1 cup)
Extra bourbon biscuits to decorate (optional)

4 Ingredient Bourbon Biscuit Cake Recipe ingredients in bowls

Chocolate Ganache or Nutella?

We decided to decorate our Bourbon Biscuit Cake with a chocolate ganache, but you could also take the simplicity even further and just warm some Nutella in the microwave and pour it over the top! This does introduce a slight hazelnut flavour of course, so if you want to stick with the chocolatey Bourbon Biscuit flavour then we’d suggest the chocolate ganache topping.

I mean let’s face it, you’ll probably make this more than once anyway and can try it both ways!

4 Ingredient Bourbon Biscuit Cake Recipe on a plate to down shot with knife, biscuits, and extra ganache in a bowl

How to make Bourbon Biscuit Cake – Step by Step Method

Prep time: 15 minutes
Baking time: 15-20 minutes
Cooling time: 30 minutes

Grease and line a 7” loose bottom cake tin with baking paper.

Preheat the oven to 180C/160C fan 350F/320F fan.

Add the bourbon biscuits to the bowl of a food processor and blitz until completely broken down into fine crumbs.

Transfer the biscuit crumbs to a mixing bowl, then add the milk, flour and sugar. Stir well to combine.

Spoon the mixture into your prepared cake tin, smoothing into an even layer.

Bake for 15-20 minutes or until a skewer poked into the centre of the cake comes out clean.

Transfer the cake to a wire rack to cool for at least 30 minutes before adding the topping.

Make the topping. First, put the dark chocolate chips into a mixing bowl.

Heat the cream in a saucepan over a medium heat until starting to bubble.

Immediately pour the hot cream over the dark chocolate chips. Let it sit for 2-3 minutes.

Whisk the cream/chocolate mixture until it forms a smooth, shiny ganache.

Spoon the ganache all over the top of the cake.

If you’re using Nutella then warm it carefully in the microwave and then simply pour over.

Decorate with extra bourbon biscuits if desired.

Making a Larger Cake

If you want a larger cake then you can double the recipe but will need a longer cooking time. Another option is to make two cakes and sandwich them together with ganache – a bit like a Bourbon Biscuit itself!

4 Ingredient Bourbon Biscuit Cake Recipe on a cake stand with a slice on a plate, extra biscuits and ganache beside

Decorating your Bourbon Biscuit Cake

Feel free to get creative with how you decorate the cake! We just used a bunch of Bourbon Biscuits, but you could do crumbs, biscuit halves, or even a piped buttercream.

What else can you make from Bourbon Biscuits?

Bourbon Biscuits are used in lots of different desserts. They can be made into a cheesecake (we might have a recipe coming!) brownies, milkshakes, and more.

4 Ingredient Bourbon Biscuit Cake Recipe on a cake stand

Yield: 10 Slices