Millionaires Shortbread – Back to Basics!
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A complete ‘how-to’ guide on how to make millionaires shortbread! A homemade shortbread base, homemade caramel filling, and a chocolate topping.

So it’s been a while since I posted my last ‘back to basics’ post – my last being my no-bake lemon cheesecake post in May last year. And after the success of my youtube video on how to make Millionaires Shortbread, I thought I’d do the blog post for it too
I have obviously made quite a few millionaires shortbread recipes already, but I thought I would cover it down to every last detail. Basically, completely dumb it down into the ground so that if you are scared to make it, you won’t be any more

Shortbread
For the shortbread, it really is quite basic – you can do it by hand, or in a food processor, or in a stand mixer, or with an electric hand mixer. You just want to mix the sugar and butter together until creamy, and then add the flour and combined until a dough is formed.
If you are doing this by hand, you can add all three ingredients together, making sure the butter is cold and cubed, and rub the mixture together with the tips of your fingers until it creates a bread crumb texture. Then, you effectively knead it together to form the dough.
I always tend to use classic unsalted block butter but you can use a baking spread for this bit if you prefer. I just prefer the taste when it comes to real butter. When using a mixer to make it, you add the butter and sugar together, beat until creamy, and then add in the flour and combine.

Baking
Press the shortbread into a lined tin – I use a 9″ square tin – and make sure it’s even. I use a 9″ square tin as it’s the ultimate depth for the number of ingredients I use! If you use a smaller tin, it will take longer to bake – if you use a larger tin, you might have issues as the shortbread really isn’t that thick.
You bake it in the oven at 160ºc in a fan oven, 180ºc regular, and bake until it’s starting to golden. When it’s starting to golden, and it’s been in for at least 20-25 minutes, you’ll know it’s baked through.


Caramel
For the caramel, you REALLY have to work on it. You can’t cheat and use a tin of carnations caramel and stick it on top as it doesn’t set. You can’t really skip the steps, as it really is a caramel. I don’t often make my caramels from complete scratch as many of my readers prefer the easier versions, and I get that, but for millionaires shortbread? You do.
You have to make sure to stir the caramel a lot to prevent it from catching and burning. I use a medium level of heat, and a larger pan so its easier to stir. You have to be careful as it obviously does get VERY hot, but it’s worth it. It is delicious and heavenly.
I use a gas hob because I much much prefer it for making caramel. I get that not everyone has gas though – some have electric, some have induction – but on my gas hob, I usually use between level 7 and 6 of strength on a medium-size ring, on my 9 level hob.
You want to use actual unsalted butter – as it creates the best caramel. I use golden syrup, because it creates the most wonderful caramel, as I explain in my video. If you can’t access golden syrup, however – I suggest using the caramel from this recipe post instead.

Caramel problems
I’ve received comments about people getting little dark coloured lumps in the caramel, and this is down to catching. Once it’s caught, there isn’t really anything you can do, other than preventing it from getting any more burnt.
If your caramel is grainy by the end, that’s because you didn’t dissolve the sugar properly at the beginning. You really want to slowly melt the condensed milk, golden syrup, sugar and butter together before it starts to boil – then it will be lovely and smooth.
The timing is something I can’t really narrow down on. It takes between 5-7 minutes to boil. This can vary depending on the type of stove you use, the brand of ingredients, the pan you use, and so on. I don’t boil the caramel to temperature, and I never have.
Once you have poured your caramel onto your shortbread, you have to leave it to set. I usually do this in the fridge because it’s quicker. Once it’s set, you add the chocolate


Topping
The chocolate part is quite straight forward – you just want to melt it, and cover the top, and let it set as well. I used a mix of milk and white chocolate, but you can use whatever you fancy! All milk, all dark, all white.. or all three! Any flavour you fancy too. It’s epic and easy.
I find it easier to melt my chocolate in a microwave, but this is something I have done many times. I know my microwave in and out, but if you don’t have on, you can melt your chocolate in a double boiler which is a bowl, over a pan of simmering water.
Of course, once you have decorated your millionaires with the chocolate, you need to leave it to set. I find it easier to set it in the fridge as it’s much quicker, but that is optional. If you set it at room temperature, then it will take longer but it will be easier to portion.

Portion
So… once you’ve reached the end of making it, you enjoy it. However, cutting it up can be an issue for some. As I used a 9″ square tin, I use a 26cm knife to cut it. This is because the knife is larger than the traybake, and it makes it a hell of a lot easier. I tend to make sure it’s straight, score the chocolate ever so slightly, and then just cut straight down.
You can try a few different other things, such as scoring the chocolate when it’s not fully set yet, or heating the knife before cutting – but honestly, I just find using a large and sharp knife and going straight down is the best method for me. Some people even try cutting the traybake upside down so that the chocolate is the last bit you cut through.

Top tips
If you find once your millionaires shortbread is finished, that the caramel is rock solid and more like toffee, you overdid it slightly on the boiling. It’s best to keep and store it at room temperature from now on, so it’s at least not fridge cold hard. If your caramel is too soft, you didn’t do it for long enough, so should definitely be kept in the fridge.
You want to use a good quality pan if you can, as some pans have a very thin base. Basically, if the base is too thin, you might burn the caramel. So if you are worried, take the temperature down a notch and do it for a little longer instead to prevent any catching!
You also want to use a flat bottomed spatula, like these ones. Using a spatula with a sharp corner means you can really scrape the caramel, and prevent it from catching in the corners!
- I use this 9″ square tin
- The millionaires shortbread will last for 7 days at room temperature, or in the fridge
- The millionaires shortbread can freeze for 3+ months


Millionaires Shortbread!
Ingredients
Shortbread Ingredients
- 200 g unsalted butter
- 100 g caster sugar
- 300 g plain flour **
Caramel Ingredients
- 200 g unsalted butter
- 3 tbsp caster sugar
- 4 tbsp golden syrup
- 397 g condensed milk (one tin)
Decoration
- 200 g milk chocolate
- 100 g white chocolate
Instructions
- Preheat your oven to 180ºc/160ºc fan, and line a 9x9inch deep square tin with parchment paper.
- Cream together the sugar and butter in a stand mixer with the paddle attachment until smooth – mix in the flour until a dough is formed. It will be crumbly but the ingredients will be evenly dispersed!
- Firmly press the mixture into the bottom of tin and bake in the oven for 20-25 minutes until pale golden on top!
- Once baked, remove from the oven and leave to the side. In a large saucepan pour the condensed milk, butter, sugar, and golden syrup and melt on a medium heat until the sugar has dissolved – stir frequently to stop anything from catching.
- Once the sugar has dissolved, turn the heat up high and let the mixture come to boiling point and boil for 5-7 minutes stiring constantly so that the mixture doesn’t catch. BE CAREFUL as the mixture is VERY hot and can burn you if it splashes back!
- The mixture will be ready when it has changed to a slightly darker golden colour, and has thickened to a soft fudge texture!
- Pour the caramel onto the shortbread base and leave to set for an hour in the fridge.
- Once set, melt the milk chocolate and pour over the caramel – melt the white chocolate and pour over too - swirl it into the milk chocolate with the end of a cake skewer so it forms a pretty pattern.
- Chill the shortbread back in the fridge for another 1-2 hours until the chocolate has gone hard**!
- Chop your shortbread into the separate pieces and enjoy!
Notes
- This will keep in an airtight container for at least 1 week – if they last that long
- If you can't access golden syrup, you can give corn syrup or honey or similar a go, but I have not tested these as much. Alternatively, you can use my millionaires flapjacks caramel
- If your caramel is rock solid when you remove it from the fridge, you have slightly over done it. Not to worry though, when you pour the chocolate on, leave it to set at room temperature rather than in the fridge and it should soften the caramel slightly.
- **If you struggle to cut your shortbread and tray bakes without the chocolate cracking on top, set it at room temperature rather than in the fridge and it’ll be softer so therefore won’t crack when you cut it
- I recommend using a 9" square tin like this one
- I also recommend using a spatula like these to prevent any catching
- And if you are wondering - this is the golden syrup I use.
- ** recipe updated to be 300g instead of 275g plain flour for ease of using a 1:2:3 ratio with sugar, butter and flour - both quantities work well so continue to use 275g if you prefer it.
ENJOY!
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J x
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Turned out honestly amazing, was a bit worried because the caramel mixture split whilst I was making it and seemed very buttery/ oily. Took it off the heat, mixed it lots and then poured some of the butter away lol it turned out unreal!!!!
I’ve lost count how many times I’ve used this recipe. Has worked out every time. Just made 2 batches this morning. Everyone loves them.
Thanks for sharing recipe
Hi, I haven’t made this yet but my brother in law has requested it for his birthday. Only problem is he would like a “not too thick” layer of caramel. If I halved the recipe for the caramel would that do the trick?
It should be fine!
Absolutely spot on with all layers of this wonderful millionaires shortbread. I have now made it 6 times and its perfect every time. Janes tips make this an easy to make fabulously delicious cake.
6 times!! That is insane, thank you so much, I am so glad you love it!x
Hi,
Thinking of making these soon, they look divine!
Would a 17 x 17cm tin be appropriate or would I need to change the amount of ingredients. Thanks x
Hiii, if you used this size tin you would only need to use half of the mixture!xx
Can I add choc chips into the shortbread base?
Hello! Yes if you wish xx
Could you add Salt to the shortbread for a salty sweet flavour?
Love this. Kids gave it 10/10. The only change I made was to do 200g dark chocolate and 100g milk. Will definitely make again!
Hello! I am so glad you and the children loved it. Yay!xc
Sublime….. better than any shop bought millionaires by a mile.
If it’s possible Jane, could you include how many grams there are of caster sugar and golden syrup in the caramel as I find it very difficult to judge when it says tablespoons and probably always put slightly too much in, especially when it comes to golden syrup 😋
45g caster sugar
84 g golden syrup
First time I’ve made millionaires and was really worried about the caramel part. I did watch the video which helped. Had really good feedback from the ‘professional cake tasters’ at work (otherwise known as the maintenance team). I nearly broke my teeth leaving it in the fridge overnight but by lunchtime the caramel had softened.
The best caramel slice recipe I’ve used!! The shortbread mixture sometimes sticks to the bottom of my mixer but that’s purely just my mixer and once I scrape it all off and put it in the tray it still makes a perfect shortbread. The caramel is absolutely amazing it has gone perfect all 3 times I’ve used this recipe. I prefer just milk or dark chocolate on top of mine but that’s just personal preference really. Everyone try this recipe it’s amazing!!
Brilliant easy to follow recipe, delicious thank you
Turned out brilliantly thank you
Fantastic recipe!
I used Maizebite flour from Matthews Cotswold for the shortbread base and it turned out absolutely stunning! Perfect texture and flavour.
I did burn the caramel a bit but that was down to my own carelessness – it still set perfectly and tastes amazing which is all that really matters…
Finally, I used a mix of Cadbury’s Dairy Milk and Milkybar for the topping but next time I think I’d go for something a bit less sweet; probably replacing the Dairy Milk for something with a higher cocoa % as you really don’t need a lot of sweetness from the chocolate when you have that caramel layer too.
This will be my go-to millionaire’s recipe from now on – thanks Jane!
I found the same thing with Cadburys dairy milk so I replaced it with cadburys dark milk which is perfect,not as bitter as Bournville with a smoother taste.
I submitted an earlier post that was a little critical of this recipe. That was BEFORE I tasted my end product. Having sampled them now myself and given some away, the general consensus of opinion is that these are devine – a real guilty pleasure!
Hi Jane
When I make the caramel I see to end up with what seems to be a film of butter / oil. Any reason for this? How do I rectify it?
Thank you
This sounds like its split a little – you can take it off the heat and really just beat it like crazy and it should bring it back easily!