Name: Biscoff Millionaires Shortbread Recipe
Prep time: 20 min
Cook time: 20 min
Total time: 3 h 40 min
Cuisine: British
Ingredients: 500 g Biscoff biscuits; 185 g unsalted butter, melted; 200 g unsalted butter; 3 tbsp caster sugar; 4 tbsp golden syrup; 397 g condensed milk (approximately 1 can); 250 g milk chocolate; 200 g Biscoff spread; Biscoff crumbs, for sprinkling

Jump to Recipe·4 from 10 reviews

I absolutely love sharing this Biscoff Millionaires Shortbread Recipe with friends because it combines deep caramel richness with that unmistakable Biscoff spice in every bite. The combination of a crunchy Biscoff biscuit base, luscious homemade caramel, and creamy Biscoff chocolate topping makes this traybake my go-to treat when I want something both indulgent and comforting. It’s the perfect balance of sweet and buttery, and every time I make it, I fall in love all over again.

Why You’ll Love This Biscoff Millionaires Shortbread Recipe

What truly makes this Biscoff Millionaires Shortbread Recipe special to me is its magical blend of textures and flavors. The biscuit base offers a satisfyingly crisp crunch infused with that unique Biscoff warmth. Then, layered with a silky smooth caramel that I make at home, it feels like the ultimate sweet hug. The crowning glory is the top layer, where creamy milk chocolate mingles with Biscoff spread, adding a final burst of velvety spice and sweetness that’s truly irresistible. Each bite feels like a moment of pure joy.

Besides taste, I find this recipe remarkably straightforward to put together, even though it looks fancy enough to impress at any occasion. It only takes a little patience to let each layer set, but the steps themselves are easy to follow, which is perfect for me when I want to bake something special without fuss. Whether I’m making it for a cozy afternoon tea, a festive gathering, or a weekend treat to share, this traybake always feels like a crowd-pleaser. It stands out because no matter how many times I bake it, I get those “wow” reactions from everyone who tastes it.

Ingredients You’ll Need

The image shows two plates on a white marbled surface. The top plate is white and filled with a single layer of light brown, crumbly powder with a rough texture. Below it is a small white plate with a blue floral pattern around the edges, holding a rectangle piece of pale yellow butter with a smooth texture. A woman's hand is pinching a small bit of butter on the small plate. Photo taken with an iphone --ar 4:5 --v 7

All the ingredients for this Biscoff Millionaires Shortbread Recipe are simple pantry staples that come together beautifully to create layers of flavor and texture. Each component plays a vital role in achieving that perfect balance between crunchy, soft, and creamy.

500 g Biscoff biscuits: These provide the signature spiced crunch for the base and are essential for that authentic flavor.
185 g unsalted butter: Melting this into the biscuit crumbs binds the base and adds richness without overpowering.
200 g unsalted butter (for caramel): Creates the luscious, smooth texture of the homemade caramel.
3 tbsp caster sugar: Sweetens and helps to caramelize the filling just right.
4 tbsp golden syrup: Adds depth and sticky chewiness to the caramel layer.
397 g condensed milk: The key to achieving that dreamy, fudgy caramel consistency.
250 g milk chocolate: Gives the topping a creamy and indulgent chocolate flavor.
200 g Biscoff spread: Infuses the topping with extra Biscoff spice and smoothness.
Biscoff crumbs: To sprinkle on top for a pretty, crunchy finish that enhances texture.

Directions

Step 1: Blitz the Biscoff biscuits in a food processor until they form fine crumbs. If you don’t have a processor, you can crush them in a bag with a rolling pin. Melt the 185 g of unsalted butter and either pulse it into the crumbs or mix thoroughly in a bowl until evenly combined.

Step 2: Line a 9×9 inch square tin with parchment paper, then tip your biscuit mixture into the tin. Press it down firmly and evenly using the back of a spoon or your fingers to create a compact base. Set this aside while you prepare the caramel.

Step 3: In a large saucepan over medium heat, add the 200 g unsalted butter, caster sugar, golden syrup, and condensed milk. Stir frequently until the sugar has completely dissolved, careful not to let anything stick or burn on the bottom.

Step 4: Increase the heat to high and let the mixture come to a gentle boil. Stir constantly for 5 to 7 minutes. You’re looking for the caramel to thicken and develop a darker golden color with a soft fudge texture. Be cautious as the caramel will be very hot and sticky.

Step 5: Pour the caramel evenly over the biscuit base and spread it out gently. Leave this to set for 1 to 2 hours at room temperature, or place it in the fridge if it’s warm to speed up the process.

Step 6: While the caramel sets, melt the milk chocolate carefully in a microwave or bain-marie, stirring frequently to avoid burning. In a separate small bowl, heat the Biscoff spread for about 30 to 40 seconds to soften it.

Step 7: Mix the softened Biscoff spread into the melted milk chocolate until smooth and evenly combined. Spread this delicious topping over the set caramel layer.

Step 8: Sprinkle Biscoff crumbs generously over the top to give an extra crunch and a beautiful finish. Let the entire traybake set on the side or in the fridge until the chocolate is firm before slicing into squares and enjoying.

Servings and Timing

This recipe yields approximately 16 pieces of delectable Biscoff Millionaires Shortbread, perfect for sharing or indulging slowly over several days. The prep time takes about 20 minutes, with baking and boiling combined around 20 minutes as well. However, the most important part is the setting time — I recommend allowing at least 3 hours in total for the caramel and chocolate layers to fully firm up. From start to finish, expect around 3 hours and 40 minutes before you can dive in, but trust me, the wait is so worth it.

How to Serve This Biscoff Millionaires Shortbread Recipe

A square dessert bar with three clear layers sits on a white plate with a beaded edge, placed on a white marbled surface. The bottom layer is a crumbly, golden-brown crust with a slightly rough texture. Above that is a smooth, light tan middle layer, which looks creamy and firm. The top layer is a dark chocolate brown, glossy and thick, with some small crumbs scattered over it. The dessert is neat with clean edges, showing the contrast between each layer clearly. Photo taken with an iphone --ar 4:5 --v 7

I find the best way to serve this shortbread is at room temperature so the layers hold their shape but still feel luxuriously soft and a little gooey without being too firm. It pairs beautifully with a cup of strong black coffee or a frothy cappuccino, balancing the sweetness perfectly. For an adult twist, I sometimes serve it with a glass of sweet dessert wine or even a lightly spiced chai to complement those warm Biscoff flavors.

When I’m putting this out for parties or family get-togethers, I like to cut the traybake into neat squares and arrange them on a pretty platter topped with a light dusting of cocoa or a few edible flowers for color contrast. Adding a handful of fresh berries alongside adds a refreshing brightness that cuts through the richness in the most delightful way. These little details always add a lovely impression when you’re sharing dessert with friends.

This recipe is perfect not only for holiday celebrations but also for casual weekend treats or bake sales. It’s rich enough to feel indulgent but not so heavy you only want a small piece. I recommend portion sizes around two small squares per person for a sweet finish after a meal, or larger if it’s a dessert centerpiece. Whatever way you serve it, this Biscoff Millionaires Shortbread always manages to bring smiles and repeat requests.

Variations

I love experimenting with this recipe to suit different tastes and dietary needs. For example, substituting the milk chocolate with dark chocolate can give the topping a richer, less sweet profile that works well for those who prefer a more intense cocoa flavor. If you want to switch things up even more, try stirring in some chopped nuts like hazelnuts or pecans into the caramel for subtle crunch and extra nuttiness.

For a gluten-free version, just make sure to use certified gluten-free Biscoff-style biscuits or a similar spiced cookie base. I’ve also had success replacing the butter with vegan-friendly alternatives like coconut oil or vegan margarine for a dairy-free spin. Just be sure to watch the texture of the caramel as some substitutions can alter the setting time slightly.

Another fun variation I enjoy is swirling a teaspoon of sea salt into the caramel before it sets, which adds an irresistible salty-sweet contrast that’s absolutely dreamy. Some fellow bakers even like to add a layer of crushed pretzels under the caramel for a savory surprise. Feel free to get creative—you can easily customize this Biscoff Millionaires Shortbread Recipe to make it your own signature treat.

Storage and Reheating

Storing Leftovers

When I have leftovers, I store the shortbread in an airtight container to keep it fresh. It stays delicious for up to 5 days when kept at room temperature, but I prefer placing it in the fridge to extend freshness, especially in warmer weather. Just make sure to separate layers with parchment paper if stacking to prevent sticking.

Freezing

This Biscoff Millionaires Shortbread Recipe freezes very well! I usually cut it into portions and wrap each piece tightly in cling film, then store them all inside a freezer-safe container. It keeps well for up to 2 months. When I’m ready to enjoy, I thaw the pieces overnight in the fridge so that the texture stays perfect without getting soggy.

Reheating

I recommend eating this traybake chilled or at room temperature rather than reheating it, to preserve the layers and avoid melting the chocolate topping. If you prefer it a bit softer, placing the slices out for 30 minutes on the counter works wonderfully. Avoid microwaving as it often causes the caramel to become too runny or the chocolate to seize—trust me, it’s best enjoyed as is!

FAQs

Can I use store-bought caramel instead of homemade?

Absolutely! While the homemade caramel in this Biscoff Millionaires Shortbread Recipe creates a rich, fresh flavor, using store-bought caramel can save time and still be delicious. Just choose a good-quality, thick caramel sauce to ensure it sets properly on the biscuit base.

Is it possible to make this recipe vegan?

Yes, with some swaps! You’d want to use vegan butter or coconut oil, a plant-based condensed milk alternative, vegan chocolate, and ensure your Biscoff biscuits or substitutes are vegan-friendly. The texture will be slightly different but still very tasty.

Can I add nuts or other mix-ins to this traybake?

Definitely! Chopped nuts, crushed pretzels, or even a sprinkle of sea salt on the caramel can add exciting textures and flavors. Just fold them into the caramel before pouring it over the base for best distribution.

How thick should the caramel layer be?

I like to pour enough caramel to create a thick, indulgent layer—roughly 1/3 inch thick. This ensures you get that rich chewiness without overpowering the biscuit or chocolate layers.

What’s the best way to cut the shortbread without cracking the topping?

I suggest using a sharp, heavy knife warmed under hot water then dried before slicing. This helps the knife glide smoothly through the layers without cracking the chocolate or caramel, giving you clean, beautiful squares.

Conclusion

I can’t wait for you to try this Biscoff Millionaires Shortbread Recipe and discover just how deliciously addictive it is. It’s one of those recipes that feels both luxurious and comforting, perfect for sharing or rewarding yourself after a long day. From the crunchy base to that dreamy caramel and rich chocolate topping, every bite is a little celebration. Trust me, once you make this traybake, it’ll quickly become one of your absolute favorites.