Millionaires Shortbread – Back to Basics!
*This post may contain affiliate links. Please see my disclosure for more details!*
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!
Find my other Traybake Recipes on my Recipes Page!
You can find me on:
Instagram
Facebook
Pinterest
Twitter
Youtube
J x
© Jane’s Patisserie. All images & content are copyright protected. Do not use my images without prior permission. If you want to republish this recipe, please re-write the recipe in your own words and credit me, or link back to this post for the recipe.

I love all your recipes and this one looks amazing and so simple! I just wondered if it’s possible to make the caramel a few days in advance and store it? If so, how would you recommend storing it? Thanks!
Hiya! Unfortunately for this you can’t make the caramel in advance. You can make the entire traybake, but not the caramel on it’s own as it’s designed to set solid. x
Hi there, this might be a silly question, but will it matter if I use an 8×8 pan or will the layers be too thick? I’m not sure I can be bothered to try and calculate the quantities for a smaller pan though 😂.
Many thanks, Helen
Hey! So an 8×8″ square is about 4/5 of the size – so it will definitely make it a chunk deeper, but it should be fine as long as your tin is quite deep!
Hi Helen. I don’t have the exact same pan sizes Either, so I make roughly a three quarter size one and then a small one (just for me!) in a bowl lined with parchment paper. Tastes perfect every time!
Hi, i love all your recipes! Im really struggling with the caramel, this time round its got brown flaky bits in it, does this mean its burnt? And can it be saved? Everything else is perfect though.
Hey! That means it’s started to catch, so the flecks are bits of burnt caramel! It will still set absolutely fine, it might just have flecks running throughout but it’s more complicated to try and remove so I’d just go with it!
Hi, thanks for your recipes! I made this today and it all set ok, but I’ve realised my caramel is pale compared to yours, I presume I maybe didn’t heat it long enough but I was worried about burning it. Does it affect the flavour if it is quite pale?
Thanks
Sorry, just seen you answered the same question underneath!
Your recipes are always fab so this one wasn’t any different! My caramel set well in the fridge and has cut well etc so I think it’s fine, but it’s quite light in colour. Does this mean I’ve undercooked it or can this sometimes just happen? I think I took it off the heat too early because I was worried about it going more like toffee if I overdid it, but the only sign it’s underdone is the colour so I’m not sure!
So sometimes it can just happen! If it’s set well, I wouldn’t change anything! xx
Hi!
I like using a candy thermometer when making caramel .. what temperature would I need the caramel to be for this caramel? 🙂
I don’t make this caramel to a particular temperature, sorry!
Amazing! I was worried about making the caramel but it turned out lovely. Definitely recommend!
This recipe is amazing!!! Been making millionaires shortbread for years and just tend to use the BBC recipe, however, thought I’d try a new one and ended up making the best milionaires shortbread yet! Love them xxx
Ahh thank you so much!! Xx
Yet another amazing recipe! I have never ever been able to make these. I watched your video and then halved recipe as only two of us in the house! They are amazing!!
Only problem is now I want a kitchen aid haha which one would you suggest? Which is in this video? Looks smaller and easy to clean
Ahhh yay! So glad you enjoyed the recipe! And mine is a 4.8L artisan!! x
This recipe is AMAZING! I was so worried about making the caramel but it turned out perfect! Thank you so much for sharing with us.
Ahh yay! So glad it was a success! x
I absolutely love this! I also love that I was able to make it! Loved the video showing how to make the caramel, I’ve managed it twice (2nd time I did with a GF base for my dad and the rest of your recipe). So thank you. It’s my favourite cake to eat out, I have it every week and now I can make my own. Love your recipes!
Another amazingly perfect recipe. You just can’t go wrong following any of your recipes. Would it make a difference pouring the caramel on a hot shortbread? I did the caramel whilst the shortbread was in the oven so when it came out I waited 15 minutes for it to cool before pouring.
Hey! So I usually leave the shortbread to cool a bit first, and then pour the hot caramel on and straight in the fridge – it shouldn’t make a difference putting hot onto hot, but leaving the caramel to sit for a bit can sometimes cause it to go a bit funny (but if it worked for you then don’t worry!!) x
Since my disaster the first time around, I’m very pleased to announce that the second attempt has gone very well. I heated the caramel very slowly, used a sugar thermometer just to keep an eye on things and didn’t boil it to death. Success!
Not only that but I blitzed the gone-wrong caramel shortbread in the food processor and it’s made the most amazing crumble topping – delicious with hot, tart fruit and a scoop of ice-cream!
Hey lovely, love all your recipes, you’re very talented! definitely going to make these at some point, just a quick question – would this caramel filling work in a banoffee pie? lots of love x
I would actually say this is too firm – I would advise using my caramel sauce recipe!! x
Excellent recipe and tutorial! I could have held my nerve for a minute longer to achieve the depth of caramel colour but was too scared that I would burn the caramel! It was still delicious and held its shape when cut.
I have not got any caster sugar, what could I substitute it for please? x
Ideally you would have caster, or even golden caster sugar – otherwise, light brown sugar for example can work, but the colour will be naturally darker so it’s harder to see when you need to take the mix off! x