How to make a Biscoff Millionaire Slice! tutorial
How to make a Biscoff Millionaire Slice! tutorial is a easy British recipe that serves 8. 350 calories per serving. Recipe by Fitwaffle Kitchen on YouTube.
Prep: 2 hrs 5 min | Cook: 10 min | Total: 2 hrs 35 min
Cost: $46.82 total, $5.85 per serving
Ingredients
- 200 g Lotus Biscoff Biscuits (crushed to fine crumbs)
- 100 g Unsalted Butter (melted)
- 397 g Sweetened Condensed Milk (one standard can)
- 50 g Unsalted Butter (for caramel) (cut into pieces)
- 100 g Light Brown Sugar (packed)
- 1 pinch Salt (fine sea salt)
- 2 Tbsp Golden Syrup (liquid golden syrup)
- 200 g White Chocolate Chips (melted)
- 150 g Biscoff Spread (also called cookie butter, melted with chocolate)
- 30 g Additional Biscoff Spread for Drizzle (melted separately for decorative drizzle)
Instructions
Prepare the Biscuit Base
Place Lotus biscuits in a food processor (or sealed zip‑lock bag) and pulse until fine crumbs. Melt the butter, pour over the crumbs, and stir until evenly coated.
Time: PT10M
Press and Chill Base
Transfer the crumb mixture to a 9×13 in baking tray, press firmly with the back of a spoon or a flat glass to create an even layer. Refrigerate for 15 minutes to set.
Time: PT15M
Make the Caramel Layer
In a saucepan combine condensed milk, butter, light brown sugar, salt, and golden syrup. Stir over low heat until smooth, then increase to medium and bring to a boil, stirring constantly, until the mixture reaches the soft‑ball stage (≈115 °C/240 °F).
Time: PT10M
Temperature: 115°C
Add Caramel to Base
Pour the hot caramel over the chilled biscuit base, spreading quickly to the edges. Smooth the surface with a spatula, then refrigerate for 1 hour until firm.
Time: PT1H
Melt White Chocolate and Biscoff Spread
Combine white chocolate chips and 150 g Biscoff spread in a microwave‑safe bowl. Microwave in 30‑second bursts, stirring between bursts, until fully melted and smooth.
Time: PT5M
Top with Chocolate‑Biscoff Layer
Pour the melted mixture over the set caramel, spreading evenly. Give the tray a gentle shake to create a smooth finish. Drizzle the remaining melted Biscoff over the top and drag a knife through the drizzle to form a decorative pattern.
Time: PT5M
Final Set and Serve
Return the tray to the refrigerator and let it set for at least 30 minutes. Once firm, cut into squares or bars and serve.
Time: PT30M
Nutrition Facts
- Calories
- 350
- Protein
- 3 g
- Carbohydrates
- 45 g
- Fat
- 18 g
- Fiber
- 1 g
Dietary info: Vegetarian
Allergens: Dairy, Gluten, Soy
Ingredient Substitutions
- Instead of Lotus Biscoff Biscuits: Digestive biscuits, Graham crackers
- Instead of Unsalted Butter: Margarine, Coconut oil (for dairy‑free)
- Instead of Sweetened Condensed Milk: Evaporated milk + sugar
- Instead of Unsalted Butter (for caramel): Margarine
- Instead of Light Brown Sugar: Dark brown sugar, Turbinado sugar
- Instead of Salt: Kosher salt
- Instead of Golden Syrup: Honey, Maple syrup
- Instead of White Chocolate Chips: White chocolate bar broken into pieces
- Instead of Biscoff Spread: Nutella (different flavor), Almond butter
- Instead of Additional Biscoff Spread for Drizzle: Caramel sauce
Equipment Needed
- Mixing Bowl
- Food Processor or Zip‑Lock Bag and Rolling Pin
- Baking Tray (9×13 in)
- Saucepan
- Microwave‑Safe Bowl
- Spatula
- Knife or Offset Spatula for Pattern
- Refrigerator
Critical Steps — Do Not Skip
- Crush Lotus biscuits to a fine, uniform crumb.
- Achieve the soft‑ball stage (≈115 °C) for the caramel.
- Spread caramel quickly before it begins to set.
- Melt white chocolate and Biscoff spread gently to avoid burning.
- Create the decorative drizzle pattern while the topping is still fluid.
Chef Tips from the Video
- For extra crunch, toast the crushed Lotus biscuits lightly before mixing with butter.
- Add a pinch of sea‑salt flakes on the final drizzle for a sweet‑salty contrast.
- Use parchment paper on the tray for easy removal and cleanup.
Troubleshooting
Caramel is grainy or hard after cooling.
Ensure the mixture reached the soft‑ball stage; if it overshoots, it will set too hard. Re‑heat gently and add a splash of cream if needed.
Chocolate topping separates or looks oily.
Melt the chocolate and Biscoff spread over low power, stirring constantly. If separation occurs, add a teaspoon of vegetable oil and whisk vigorously.
Dessert sticks to the knife when cutting.
Warm the knife blade under hot water, dry, and slice quickly.
Storage
Refrigerator: Store in an airtight container for up to 5 days.
Freezer: Can be frozen for up to 1 month; thaw in the fridge before serving.
Room temperature: Not recommended; the caramel may soften.
Make-Ahead Tips
- Prepare the biscuit base and caramel layer a day ahead; keep refrigerated.
- The chocolate‑Biscoff topping can be made up to 2 hours before serving and kept chilled.
Frequently Asked Questions
What is the cultural significance and history of Millionaire's Shortbread in British cuisine?
Millionaire's Shortbread originated in Scotland in the 1970s as a richer version of traditional shortbread, adding a caramel layer and chocolate topping to create a decadent treat often served at celebrations and tea time.
What are the traditional regional variations of Millionaire's Shortbread in the United Kingdom?
While the classic version uses plain shortbread, some regions add toasted oats, nuts, or flavored caramel (e.g., whisky‑infused). The no‑bake Lotus version adapts the base to a biscuit crumb for a quicker, lighter texture.
How is Millionaire's Shortbread traditionally served in Scotland?
It is typically cut into small squares or bars and served with tea or coffee, often dusted with a light sprinkling of sea‑salt or cocoa powder for contrast.
What occasions or celebrations is Millionaire's Shortbread traditionally associated with in British culture?
It is popular at birthdays, Christmas, weddings, and afternoon tea gatherings, valued for its rich flavor and impressive appearance.
How does this No‑Bake Lotus Millionaire's Shortbread fit into the broader British dessert tradition?
It reflects the British love for layered sweets—shortbread, caramel, and chocolate—while offering a modern, quicker preparation method that still honors the classic indulgence.
What are the authentic traditional ingredients for Millionaire's Shortbread versus acceptable substitutes?
Traditionally it uses plain shortbread, butter caramel, and milk chocolate. In this recipe, Lotus biscuits replace shortbread, golden syrup adds depth to the caramel, and Biscoff spread provides a unique spice note; substitutes include digestive biscuits, honey, or regular chocolate.
What other British desserts pair well with No‑Bake Lotus Millionaire's Shortbread?
Serve alongside a classic Victoria sponge, lemon drizzle cake, or a simple fruit crumble for a balanced dessert table.
What makes No‑Bake Lotus Millionaire's Shortbread special or unique in British cuisine?
It combines the iconic Lotus Biscoff flavor with the beloved Millionaire’s layers, offering a no‑bake, faster alternative that still delivers the rich, buttery, caramel‑chocolate experience.
What are the most common mistakes to avoid when making No‑Bake Lotus Millionaire's Shortbread?
Common errors include under‑crushing the biscuits, not reaching the soft‑ball stage for the caramel, letting the caramel set before spreading, and overheating the chocolate‑Biscoff topping, which can cause separation.
Why does this recipe use golden syrup in the caramel instead of corn syrup?
Golden syrup adds a subtle buttery flavor that complements the Lotus biscuits, whereas corn syrup would be more neutral; the choice enhances the overall taste profile of the dessert.
Can I make No‑Bake Lotus Millionaire's Shortbread ahead of time and how should I store it?
Yes, you can prepare the base and caramel a day ahead, keep it refrigerated in an airtight container, and add the chocolate‑Biscoff topping just before serving. Store the finished bars in the fridge for up to five days.
What does the YouTube channel Fitwaffle Kitchen specialize in?
Fitwaffle Kitchen focuses on quick, health‑conscious, and often no‑bake recipes that blend classic comfort foods with modern twists, delivering easy‑to‑follow videos for home cooks.
How does the YouTube channel Fitwaffle Kitchen's approach to British dessert cooking differ from other British cooking channels?
Fitwaffle Kitchen emphasizes minimal cooking equipment, shorter preparation times, and ingredient swaps that keep desserts lighter while preserving traditional flavors, unlike many channels that stick to classic, time‑intensive methods.
Last updated: August 29, 2026
