There is nothing quite like a rich, nutty treat that combines simple ingredients into pure magic, and that is exactly what the 4 Ingredient Choc Hazelnut Slice Recipe delivers. This slice captures the perfect balance of crunchy digestive biscuits, luscious condensed milk, bittersweet dark chocolate, and toasted hazelnuts. It’s a no-fuss showstopper that comes together in minutes but leaves a lasting impression. Whether you’re whipping up a quick dessert for friends or craving something sweet to accompany your afternoon tea, this recipe is an absolute winner that everyone will adore.

Ingredients You’ll Need
You only need four straightforward, pantry-friendly ingredients to create this luscious choc hazelnut slice. Each one plays an essential role: the biscuits bring that perfect crunch, the condensed milk adds creamy sweetness, the dark chocolate offers depth and richness, and the toasted hazelnuts contribute a fragrant crunch with every bite.
- 250g digestive biscuits: Crushed finely, they provide the crunchy foundation and a subtle sweetness that balances the recipe.
- 395g sweetened condensed milk: This sticky, rich milk adds moistness and sweetness, helping bind the biscuits together perfectly.
- 200g dark chocolate: Melted smoothly, it forms a luxurious, bittersweet layer that tops off the slice with decadence.
- 100g toasted hazelnuts: Roughly chopped and toasted, these bring aroma, texture, and a nutty contrast that elevates every bite.
How to Make 4 Ingredient Choc Hazelnut Slice Recipe
Step 1: Prepare Your Tin
Start by lining an 8×8 inch baking tin with parchment paper. This simple step ensures your slice will lift out easily once it’s set, making slicing a breeze without any sticky mess.
Step 2: Mix Biscuit Base
In a large mixing bowl, combine the crushed digestive biscuits with the sweetened condensed milk. Stir them together until every crumb is beautifully coated in that sweet, silky milk, which will hold the base firmly once chilled.
Step 3: Incorporate Hazelnuts
Next, fold in half of the toasted hazelnuts. These little pieces of nutty goodness mixed through the biscuit base give bursts of flavor and texture when you bite into the slice.
Step 4: Press Into the Tin
Transfer the mixture to your prepared tin and press it down firmly. Use the back of a spoon or a spatula to level the surface and compact the ingredients together so the slice has perfect shape and firmness.
Step 5: Add the Chocolate Layer
Pour the melted dark chocolate evenly over the biscuit and hazelnut base. Use a spatula to spread it across, ensuring every corner is luxuriously coated with this glossy, bittersweet layer that contrasts beautifully with the sweet base.
Step 6: Sprinkle Remaining Hazelnuts
Sprinkle the remaining toasted hazelnuts over the chocolate layer. This adds a gorgeous finishing touch of texture and makes the slice irresistibly inviting to the eye and the palate.
Step 7: Chill to Set
Place the tin in the refrigerator for at least two hours or until the chocolate is firm and the entire slice is set. This chilling step is essential to achieve the perfect firm texture that holds together when sliced.
Step 8: Slice and Serve
Once set, lift the slice out using the parchment paper edges. Use a hot knife to cut it smoothly into 16 squares. This warm blade trick prevents cracking and gives you perfectly neat pieces ready for sharing.
How to Serve 4 Ingredient Choc Hazelnut Slice Recipe
Garnishes
Think beyond just plain slices! A light dusting of cocoa powder or a drizzle of extra melted chocolate can add an elegant flourish. Fresh berries or a sprinkle of sea salt can also enhance the rich flavors and create a balance between sweet and savory.
Side Dishes
This slice pairs beautifully with a scoop of vanilla ice cream or a dollop of whipped cream to add softness against the crunchy texture. A cup of strong coffee or a rich black tea also complements the nutty, chocolatey notes perfectly.
Creative Ways to Present
For parties, arrange the squares on a wooden board alongside assorted nuts and dried fruits. You can also layer smaller pieces with cream and berries in glass jars for a stunning individual dessert presentation that feels special and fun.
Make Ahead and Storage
Storing Leftovers
Keep any leftover slices in an airtight container in the refrigerator to maintain their firmness and fresh taste. They should stay perfect for up to a week, making this a great recipe to make ahead for busy days or unexpected guests.
Freezing
If you want to store the slice longer, it freezes wonderfully. Wrap the uncooked or fully set slice tightly in plastic wrap and foil, then freeze for up to two months. Just thaw in the fridge overnight before serving for the best results.
Reheating
This treat is best enjoyed chilled or at room temperature, so reheating isn’t necessary. If you prefer a softer texture, allow the slice to sit at room temperature for 15-20 minutes before serving — the chocolate becomes delightfully tender but won’t melt entirely.
FAQs
Can I use other types of nuts instead of hazelnuts?
Absolutely! Walnuts, almonds, or pecans make fantastic substitutes and will bring their own unique crunch and flavor. Just toast them lightly to bring out their natural oils and aroma before adding.
Is it necessary to use sweetened condensed milk?
Yes, sweetened condensed milk is key to achieving the slice’s moist, sticky texture and rich sweetness. Replacing it may affect the binding and taste of this dessert significantly.
How do I make sure the chocolate layer is smooth?
Melting your dark chocolate gently over a double boiler or in short bursts in the microwave while stirring frequently will help you achieve a glossy, smooth texture without burning.
Can I make this slice vegan or dairy-free?
To adapt this recipe for vegan or dairy-free diets, look for dairy-free condensed milk alternatives and vegan dark chocolate. The biscuit base would also need gluten-free or vegan-friendly biscuits.
What’s the best way to crush digestive biscuits?
Place the biscuits in a sealed plastic bag and use a rolling pin to crush them finely for the best texture. Alternatively, you can pulse them a few times in a food processor, but be careful not to turn them into powder.
Final Thoughts
This 4 Ingredient Choc Hazelnut Slice Recipe is a genuine treasure to have on hand whenever you want a quick yet decadent treat. With minimal effort and so few ingredients, you get a dessert that tastes like it came from a fancy patisserie. Trust me, once you try this slice, it will become your go-to recipe when you need a sweet fix that’s totally satisfying and effortlessly impressive.
Print
4 Ingredient Choc Hazelnut Slice Recipe
- Prep Time: 15 minutes
- Cook Time: 2 minutes
- Total Time: 2 hours 17 minutes
- Yield: 16 squares
- Category: Dessert
- Method: No-Cook
- Cuisine: International
- Diet: Vegetarian
Description
This 4 Ingredient Choc Hazelnut Slice is a quick and easy no-bake dessert that combines crunchy digestive biscuits, sweetened condensed milk, rich dark chocolate, and toasted hazelnuts. Perfect for a decadent treat or sharing at gatherings, these squares set in the fridge and require minimal preparation and cooking time.
Ingredients
Base
- 250g digestive biscuits, crushed
- 395g sweetened condensed milk (1 can)
Topping
- 200g dark chocolate, melted
- 100g toasted hazelnuts, roughly chopped
Instructions
- Prepare the tin: Line an 8×8 inch baking tin with parchment paper to prevent sticking and make it easy to lift the slice out once set.
- Mix biscuit base: In a mixing bowl, combine the crushed digestive biscuits with the sweetened condensed milk until the biscuits are evenly coated and form a sticky mixture.
- Add hazelnuts to base: Stir in half of the chopped toasted hazelnuts into the biscuit mixture for added crunch and flavor throughout the base.
- Press mixture into tin: Firmly press the biscuit and hazelnut mixture into the lined baking tin using a spatula or back of a spoon to create an even, compact layer.
- Pour and spread chocolate: Pour the melted dark chocolate evenly over the pressed biscuit base, spreading it out with a spatula for a smooth chocolate top layer.
- Top with hazelnuts: Sprinkle the remaining chopped hazelnuts over the melted chocolate to add texture and garnish.
- Chill until set: Refrigerate the slice for at least 2 hours or until the chocolate and base are fully firm and set.
- Slice and serve: Lift the slice from the tin using the parchment paper, then use a hot knife to cut into 16 squares. Serve chilled.
Notes
- Use a hot knife dipped in boiling water for clean chocolate cuts.
- Digestive biscuits provide a crunchy, slightly sweet base; you can substitute with graham crackers if preferred.
- Ensure the hazelnuts are toasted for optimal flavor and crunch.
- Store leftovers covered in the refrigerator for up to 5 days.
- For a nut-free version, omit hazelnuts and add extra crushed biscuits.

