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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. Rachel S on June 22, 2020 at 10:56 am

    5 stars
    I love making these as you get so much from one batch and they are a hit with friends, family and work!
    I tend to adjust the biscuit base ingredients slightly just to make it a little thinner but otherwise great recipe to use!

  2. Kate on June 21, 2020 at 12:44 pm

    4 stars
    I loved the recipe the only thing I found with how mine turned out was that the bottom was slightly crumbly. I did exact as recipe. I think next time I will
    add a little more butter.

  3. Natalie Harmes on June 21, 2020 at 9:00 am

    5 stars
    Wow wow wow. These are amazing and sooo tasty!!! If your a biscoff lover then these are 100% worth it!! Thank you so much for sharing your recipe.

  4. Michelle on June 19, 2020 at 8:10 am

    5 stars
    Made this and while it didn’t turn out perfect, for a first go it was delicious!! I wanted to check though, my caramel was very chewy, does this mean I’ve overdone it?

    • Jane's Patisserie on June 19, 2020 at 8:27 am

      Hey! Yes it does! Chewy = overdone! X



  5. dimphna on June 10, 2020 at 9:11 pm

    could i use honey instead of golden syrup.

  6. Lyndsay on June 5, 2020 at 10:20 pm

    5 stars
    I love this and have made it twice now but still find the biscuit base crumbly i use a blitzed to make sure it’s a fine crumb?!

    • Jane's Patisserie on June 6, 2020 at 12:08 pm

      Hey! So you really just need to really really firmly push it down! You can add in more butter if you want as well! x



    • Charlotte on June 7, 2020 at 10:03 pm

      5 stars
      I’ve made this a couple of times and it has gone down so well with my family.

      To make the recipe vegan would I be able to make this with your vegan caramel instead? Or could I replace the butter with diary free butter and use coconut condensed milk? The base and top is easy to use an alternative



    • Jane's Patisserie on June 8, 2020 at 1:11 pm

      I would use the vegan caramel – I’m not a fan of this caramel with straight substitutes! x



  7. Holly Johnston on June 5, 2020 at 6:14 pm

    Hi,
    I let my caramel cool at room temperature and it’s rock solid and I’ve just tried to cut my finished product and it’s solid even after being at room temperature for a few hours, it’s like toffee. Did I cook the caramel for too long? Could you give more specific instructions on this please x

    • Jane's Patisserie on June 5, 2020 at 7:12 pm

      Hey! Yes it’s for too long – and the instructions are correct as they are I’m afraid as the timings can vary! I have a vide on my YouTube channel about making millionaires shortbread, and millionaires brownies (same caramel) so that may be useful! xx



  8. Mrs S on June 5, 2020 at 5:15 pm

    5 stars
    Amazing!!
    So easy to follow and so delicious. I love your biscoff recipes. Everything turned out perfect.

    Ps. I chilled in the freezer as i got super impatient!

  9. Stellie on June 2, 2020 at 8:53 pm

    4 stars
    What a great recipe, I’ve given it a 4 and that’s only because I haven’t been able to perfect it yet 🤣 One question I did have… could I boil the condensed milk in it’s can for a few hours instead of making the caramel in the saucepan. The butter separated from the caramel as I think I may have overcooked it?

    • Jane's Patisserie on June 3, 2020 at 10:53 am

      No you can’t – that sort of caramel does not set and won’t work! Have a watch of my millionaires shortbread video on YouTube to help you with the correct caramel! And yes, it’s probably over cooked. You can just take the pan off the heat and beat it till it comes back together.



  10. Laura on May 29, 2020 at 9:33 pm

    5 stars
    These are amazing, fab recipe! I was worried about the caramel setting but it turned out perfectly! The only thing for me was the biscuit was a bit crumbly and didn’t hold as well as I hoped, any tips on that?

    • Jane's Patisserie on May 30, 2020 at 4:45 pm

      Hey! So the biscuit base really needs to be a very fine crumb (so for example if you aren’t using a food processor, and are instead using a bowl with a rolling pin, you can’t leave any lumps!) and you also need to really really compress the mixture down! You can add more butter in to make it less crumbly if you prefer though!



  11. Hayley on May 27, 2020 at 4:42 pm

    Hi unfortunately I don’t have any caster sugar can I swap it for something else?

    • Jane's Patisserie on May 27, 2020 at 6:19 pm

      You can use golden caster sugar, or light brown sugar – you can also try granulated, but you really need to make sure the granules are dissolved properly before boiling!



  12. Danielle on May 16, 2020 at 9:03 pm

    5 stars
    made this recipe and dropped it round to a few family and friends. we all absolutely adored it and it was so easy and quick to make! your recipes are so easy to follow and taste the best. was worried about getting the caramel perfect but your video is brilliant to demonstrate the right colour it needs to boil to x

  13. Amy on May 13, 2020 at 6:57 pm

    I made theses for the first time today and they taste great my only problem when cutting my caramel squished out the sides it’s not set hard but very firm has been in the fridge all afternoon Any help? X x

    • Jane's Patisserie on May 14, 2020 at 9:13 am

      Did you definitely use condensed milk? A lot of people have been using evaporated milk instead due to shortages and they don’t work the same – alternatively, if you did, it just means it’s not been boiled for long enough! xx



  14. Charlotte on May 4, 2020 at 3:25 pm

    5 stars
    Im a massive fan of anything biscoff and any millionaires bars so these were always going to be a winnner for me. The recipe was easy to follow and they turned out great. These are definitely a favourite in our house aswell as at the office and i will be making them again

  15. Charlotte Burt on May 3, 2020 at 8:05 pm

    5 stars
    THE yummiest millionaires ever, will defo make them again🖤

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