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ty Biscoff biscuit base, homemade caramel filling, and a Biscoff chocolate topping… A Biscoff millionaires traybake!

A tower of three Biscoff Millionaires

This recipe is a popular, yet easy no-bake traybake. I have made it countless times over the years, and people always come back for more because the Biscoff obsession is real. 

Biscoff millionaires traybake

Oh hey there, a new Biscoff related recipe that I know you are all going to adore and LOVE! Why would you not love it?! Biscoff biscuits, caramel, and Biscoff spread all in one delicious combination of heavenly bites. Is it too far to say I would happily eat the entire traybake? No, probably not. 

So, who can honestly say no to a new millionaires shortbread style recipe? Certainly not me. I will say from the off, so as to stop any pedantic people… no, it’s not actually shortbread, but its a type of traybake. If you say millionaires shortbread, people get the idea, and when you add Biscoff on top of that, people automatically go ‘oooooh. I had endless requests for this as a recipe so I thought I would oblige whilst everyone is still on the Biscoff hype. 

a cut tray bake of Biscoff Millionaires

Recipe inspiration

This particular beauty is heavily inspired by my Malteser millionaires shortbread because when flavouring a millionaires, you can have fun. It is essentially the exact same thing, but swap all Malteser related goodies out for Biscoff.

Biscoff is one of my most popular flavours in the country. It’s a sweet yet spicy biscuit in a way, with the caramelised taste of wonder. The spread is even better. If you are a fan, I’d recommend dipping a lotus biscuit into the spread and devouring just that – however, when added into bakes, it’s elevated even more. 

My Biscoff cheesecake and my Biscoff cake recipe have always been super amazingly popular on my website, thanks to Zoella making them a while ago. Some people have still yet to ever try the wonders of Biscoff, and you are 100% missing out if you haven’t tried it yet yourself. Some people do put their noses up at the flavour, but if you don’t like it, that’s fine… doesn’t mean someone else can’t enjoy it. 

A single Biscoff Millionaires on a plate

Biscuit Base

So, there is quite a lot of biscuit in this recipe. The reason I use 500g of biscuits in this recipe is that a 9″ square is equivalent to a 10″ round recipe, and that’s pretty darn big and you basically need enough biscuit to make the same depth you would get from shortbread, but with biscuits and butter. You can use less if you wish, but as you may have noticed from other recipes such as my Biscoff cheesecake, I love a deep biscuit base.

I blitz the biscuits to a fine crumb, and then add in the melted butter. I do find that Biscoff biscuits do need less butter than other biscuits, which is why the recipe has less. However, as it’s a fine crumb base, you really do need the biscuits to be a fine crumb before adding in the biscuits, and then you really need to press down firmly to make the base stick together. I add the biscuits to the base of a 9″ square baking tin that I have lined on the base and sides so that the traybake doesn’t stick. 

Sometimes people can struggle with the biscuits base falling apart when cutting the finished traybake, and this is usually caused by the base not being fine enough, not pressed down far enough, or just people sawing at the bake to cut it. If you are worried, you can add 215g butter instead of 185g as the little extra butter will help. 

A large tray of cut Biscoff Millionaires with slices missing

Caramel 

My salted caramel millionaires shortbread has been a classic from the start, and I love to try new things. Millionaires traybakes are basically biscuit, caramel, and chocolate. As you can see from my various millionaires related posts, I am a big fan of it and experimenting with the idea. How can you not like the combination of biscuit, caramel and chocolate. However, when I post my millionaires, the caramel is often the same because it works so well. 

The mixture of condensed milk, sugar, golden syrup and butter is my favourite caramel – and I love it. You need to add the ingredients to a pan and melt the ingredients in the pan on low until all of the butter has melted, and the sugar has dissolved. Once the ingredients are ready, you then need to turn the heat up to a rolling boil and stir constantly for 5-7 minutes until you reach a golden colour. 

Tips for a good caramel – make sure to use a flat bottomed spatula so that you scrape all of the bottom of the pan – if you don’t, you may get little flecks in your caramel. It’s also best, if you can, to use a heavy based saucepan as cheaper or older pans can transfer the heat differently and may be hotter. Check out my YouTube video on my classic millionaires shortbread, which you can watch here – and this may help for the caramel. 

I pour the caramel onto the prepped biscuit base, and let it sit for an hour or so before adding the chocolate. I’ll often do this at room temperature as it will set enough during the entire process, you just want the caramel to have cooled slightly. 

A hand taking a Biscoff Millionaires and one on a plate

Chocolate 

The chocolate layer is slightly different compared to some of my other millionaires bakes, as I really wanted it to be as Biscoff like as possible, with elements of the classic traybake. Usually I would use one or two melted chocolates, and simply melt and swirl them together on top of the set caramel. This time, however, I made it slightly different for a couple of reasons. 

I used a mixture of melted milk chocolate (for the classic look element) and then I also added quite a considerable amount of melted Biscoff. The pro of doing a topping like this, it’s much easier to cut. Due to the additional ingredients that are in the Biscoff, it softens the top ever so slightly that means a knife cuts through the top more easily. 

You can use any chocolate that you want (dark or white instead of milk for example) but that is entirely up to you – I like the mix of the milk chocolate the most, personally. I melt the chocolate until smooth, and then I also briefly melt the Biscoff spread so that the mixture is nice and runny, and then I pour it together and mix. Pour this over the set caramel, and then I sprinkle on some crushed Biscoff biscuits. 

A jar of Biscoff spread and a bite missing from a Biscoff Millionaires

Top tips

  • You MUST NOT USE tinned caramel for the filling. It’s not the same, and it doesn’t work – it will basically be a mess in the tin and also the taste isn’t as nice as the homemade caramel. 
  • I used this 9″ square baking tin in my recipe. If you want to make half of the recipe, use a 7″ square tin. The equivalent in a round tin for the original recipe, is a 10″ circle if you wanted to use a circular tin instead. 
  • This recipe will last for 7+ days at room temperature, but also it will freeze for 3+ months. 
  • If you 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.
  • Biscoff spread is found in most supermarkets – you can use smooth or crunchy
  • If you don’t want to use the spread, you can use 300g of chocolate on the top, and plenty more biscuits
  • You can use fewer biscuits if you don’t want it as thick. Use 400g, with 135g of butter. 

A bite taken from a Biscoff Millionaires on a plate

Biscoff Millionaires 'Shortbread'

Biscoff biscuit base, homemade caramel filling, and a Biscoff chocolate topping... A Biscoff millionaires traybake!
Print Pin Rate
Category: Traybakes
Type: Millionaires Shortbread
Keyword: Biscoff
Prep Time: 20 minutes
Cook Time: 20 minutes
Setting Time: 3 hours
Total Time: 3 hours 40 minutes
Servings: 16 Pieces
Author: Jane's Patisserie

Ingredients

Biscoff Base

  • 500 g Biscoff biscuits
  • 185 g unsalted butter (see blog post)

Homemade Caramel

  • 200 g unsalted butter
  • 3 tbsp caster sugar
  • 4 tbsp golden syrup
  • 397 g condensed milk

Biscoff Topping

  • 250 g milk chocolate
  • 200 g Biscoff spread
  • Biscoff crumbs

Instructions

Biscuit base

  • Blitz the biscuits in a food processor to a small crumb, and add the melted butter – either pulse in the food processor a few times until the mixture is combined, or mix it in a bowl. 
  • Tip the biscuits into a lined 9x9" square tin and press down firmly.

Caramel

  • In a large saucepan pour the condensed milk, butter, sugar, and golden syrup and melt on a medium heat till 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 biscuit base and leave to set for one-two hours on the side. If it's hot, set in the fridge!

Chocolate

  • Melt your milk chocolate down carefully in the microwave, or in a bain-marie. 
  • Also, in a separate bowl, melt the Biscoff spread for about 30-40 seconds so that it's softer and not as hard. 
  • Mix the two together, and spread on top of the caramel. Sprinkle over some Biscoff crumbs and then set on the side or in the fridge. 
  • Once set, cut up your pieces and enjoy!

Notes

  • This will keep in an airtight container for at least 1 week – if they last that long
  • If you 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.
  • Biscoff spread is found in most supermarkets - you can use smooth or crunchy!
  • If you don't want to use the spread, you can use 300g of chocolate on the top, and plenty more biscuits
  • Using a tinned caramel in place of making your own, will NOT work. Tinned caramels do not set, so it'll be messy. 
  • You can use fewer biscuits if you don't want it as thick. Use 400g, with 135g of butter. 

188 Comments

  1. SuzieP on November 9, 2020 at 1:18 pm

    5 stars
    We adore this recipe! My son has just asked for a whole one stuck with candles for his birthday cake! Would it work, do you think, to add smooth peanut butter to the chocolate instead of Biscoff spread?

    • Jane's Patisserie on November 9, 2020 at 6:58 pm

      Ah that’s so cute! And yeah that should work well!



  2. Brie on November 8, 2020 at 3:13 am

    5 stars
    What temperature should the caramel reach before removal from the heat. I have a candy thermometer and rather use that then risk over cooking it.
    Thanks

    • Jane's Patisserie on November 8, 2020 at 10:33 am

      I never ever use a candy thermometer for this caramel I’m afraid x



  3. Ciara on November 7, 2020 at 1:34 pm

    Absolutely gorgeous recipe, great feedback from friends and family. Only thing I’d do different is add more butter to the biscuit base as it completly crumbled on me.

  4. Phoebe on October 19, 2020 at 7:54 pm

    5 stars
    Hi Jane,
    Would white chocolate work instead?

  5. Meg on October 7, 2020 at 5:22 pm

    5 stars
    Hi Jane,
    Incredible recipe as per! I need to make this nut free and I was wondering if galaxy chocolate would work for the topping? I usually use a standard shops own brand and I know not to use Cadbury’s as it splits easily!

    • Jane's Patisserie on October 8, 2020 at 9:41 am

      Yes it should work okay! As it’s just mixing with the melted biscoff it should be great! X



  6. Katy on October 4, 2020 at 7:09 pm

    5 stars
    Really nice recipe to follow! I was wondering you these would be okay to freeze?

    Thanks!

    • Jane's Patisserie on October 4, 2020 at 8:56 pm

      Yesss they can be frozen! And so glad you like them!



  7. Anne on September 16, 2020 at 8:10 am

    5 stars
    Hello

    I am planning on making this and there was only sweetened condensed milk at the supermarket. I feel like maybe the caramel will turn out a little too sweet. Would this work using the sweetened condensed milk and removing the caster sugar?

    Thanks

    • Jane's Patisserie on September 16, 2020 at 8:43 am

      UK condensed milk is sweetened generally and it’s absolutely fine – it’s important to use the recipe as it is to get the best results.



  8. Sue on September 13, 2020 at 10:28 pm

    5 stars
    The recipe was easy to follow – the result fantastic. Delicious – as have all the Jane recipes been that I’ve tried. A few more to get through still.

  9. Navreet on July 31, 2020 at 10:39 am

    5 stars
    Hey Jane,

    I tried this recipe yesterday and it worked so good!!!!

    It was insane thanks and easy to make!

    This is the 2nd recipe I tired and I love it thanks!!!! xxxxxx

  10. Sam on June 29, 2020 at 4:19 am

    Hey Jane! So I made this the other day and it was a huge hit with family and friends😋😋 My only issue is is that my Biscoff base was quite crumbly especially when I was cutting up the slices. I’ve also previously followed your Biscoff cheesecake recipe and when I made that my biscuit base was very hard and almost too difficult to cut. As far as I’m aware I’ve followed both recipes to a tee so I was just wondering if you have any advice on where I may be going wrong? Thank you so much for all your recipes, you’ve brought out the inner baker in me 🤗❤️

    • Jane's Patisserie on June 29, 2020 at 9:56 am

      Hey! So you can add in more butter if you like to bind it more (like the cheesecake) xx



    • Emily on September 2, 2020 at 4:35 pm

      Hello
      Do you have to set the biscuit base in the fridge or just leave it out. Also just to check do you literally put the boiling caramel onto the base then fridge ASAP or let it cool a little then put in fridge.



    • Jane's Patisserie on September 2, 2020 at 8:02 pm

      I don’t bother setting the base sometimes and it’s fine – and yes, you pour the caramel straight on. It can set at room temp, or the fridge, or a combo!



  11. Rach on June 27, 2020 at 5:00 pm

    5 stars
    Hi Jane! Love all of your recipes! I have made a few of the millionaires variations now but my caramel always turns out lighter than yours. It sets ok and doesn’t split or anything, is just very light in colour. Am I not cooking for long enough?

    • Jane's Patisserie on June 27, 2020 at 7:36 pm

      Hey! Thank you! Personally if it sets okay I would just do what you do. Colour usually comes from time/heat but it can still vary! I will say that the lighting in my photos can vary quite a bit to what it may look like in your own kitchen too! xx



    • Emily on September 3, 2020 at 9:21 pm

      Hello how long does it need to set after adding the melted chocolate on top? Does it need to be in the fridge?



    • Jane's Patisserie on September 4, 2020 at 2:45 pm

      It can definitely vary, but maybe a few hours? Some people set it at room temp, some fridge – obviously the fridge speeds it up!



  12. Sam on June 26, 2020 at 4:40 pm

    Hi Jane,

    For the caramel layer should the unsalted butter be room temperature or straight from the fridge?

    Thanks!

    • Jane's Patisserie on June 26, 2020 at 7:06 pm

      For the caramel it doesn’t matter as you melt it in the pan! X



  13. Rachel on June 26, 2020 at 2:09 pm

    My caramel looked like it split: the melted butter came on top and it went all grainy. I threw the melted butter out and it was a bit better but it still was a weird consistency. What did I do wrong?

    • Jane's Patisserie on June 26, 2020 at 2:39 pm

      Usually splitting occurs because the mixture has got too hot – usually you can take it off the heat and beat it like crazy and it will come back together!



  14. Erin on June 25, 2020 at 9:09 pm

    Hey Jane,

    I only have an 8 X 8 tin, can you help with how to adjust the ingredients?

    Thank you! X

    • Jane's Patisserie on June 25, 2020 at 9:28 pm

      Hey! You can use it as it is, but it will be deeper – or you can reduce the recipe by about 1/5! x



  15. SHARON Edwards on June 24, 2020 at 10:50 am

    5 stars
    Omg amazing and so easy to make! As a Carmel slice lover , this is 10 out 10 😍

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