This easy No-Bake Chocolate Biscuit Cake is made with layers of crisp biscuits, a light and creamy milk chocolate mousse, and a smooth dark chocolate ganache. There is no oven required, making it a simple yet impressive dessert for birthdays, family gatherings, or whenever you are craving something rich and chocolatey.
The biscuits soften in the creamy filling while keeping enough texture to create beautiful layers. After several hours in the refrigerator, the cake becomes perfectly sliceable and wonderfully indulgent.
Recipe Overview
| Category | Details |
| Preparation Time | 30 minutes |
| Chilling Time | At least 4 hours |
| Best Result | Chill overnight |
| Servings | 10–12 |
| Difficulty | Easy |
| Method | No-bake |
| Storage | Refrigerator |
Why You’ll Love This Recipe
This cake requires no baking, making it perfect when you want an impressive dessert without turning on the oven.
The combination of crunchy biscuits, creamy mascarpone, milk chocolate mousse, and dark chocolate ganache creates a delicious contrast of textures and flavors.
It can be prepared several hours in advance, making it an excellent dessert for entertaining and special occasions.
The simple layered appearance also makes this chocolate cake look elegant when cut into neat square portions.
Ingredients
For the Biscuit Layers and Chocolate Cream
| Ingredient | Amount |
| Rectangular plain biscuits, such as Petit Beurre | 400 g |
| Milk, for dipping | 200 ml |
| Mascarpone | 250 g |
| Heavy cream, 30% fat, very cold | 300 ml |
| Milk chocolate, melted and slightly cooled | 200 g |
For the Chocolate Ganache
| Ingredient | Amount |
| Dark chocolate, finely chopped | 150 g |
| Heavy cream | 150 ml |
Step-by-Step Instructions
1. Prepare the Chocolate Cream
Place the mascarpone and very cold heavy cream in a large mixing bowl.
Whip with an electric mixer until the mixture becomes thick, smooth, and firm enough to hold its shape.
Melt the milk chocolate gently in the microwave in short intervals or over a double boiler. Allow it to cool until it is lukewarm rather than hot.
Gradually add the cooled melted chocolate to the mascarpone cream.
Fold gently with a spatula until the chocolate is completely incorporated and the mixture becomes smooth and evenly colored.
2. Prepare the Biscuit Layers
Pour the milk into a shallow bowl.
Quickly dip each biscuit into the milk, turning it briefly so it becomes slightly softened without becoming soggy.
Arrange the dipped biscuits in a single layer on the bottom of a square baking dish or cake pan.
If necessary, break a few biscuits into smaller pieces to fill any gaps.
3. Add the Chocolate Cream
Spread an even layer of the chocolate mascarpone cream over the biscuits.
Smooth the surface with a spatula.
Add another layer of milk-dipped biscuits, followed by another layer of chocolate cream.
Continue alternating between biscuits and chocolate cream until all the ingredients are used.
For a cake similar to the pictured dessert, aim for approximately four biscuit layers.
Finish with a final layer of chocolate cream.
4. Make the Chocolate Ganache
Finely chop the dark chocolate and place it in a heatproof bowl.
Pour the heavy cream into a small saucepan and heat it over medium-low heat until it reaches a gentle simmer. Do not let it boil vigorously.
Pour the hot cream over the chopped chocolate.
Let the mixture stand for about 1 minute.
Stir slowly with a spatula or whisk until the chocolate has completely melted and the ganache is smooth, glossy, and uniform.
5. Add the Ganache
Pour the warm ganache over the top of the chilled cake.
Spread it gently with a spatula to create an even, smooth chocolate layer.
Allow the ganache to cool slightly if it is too warm before spreading so it does not melt the cream underneath.
6. Chill the Cake
Cover the cake and refrigerate for at least 4 hours.
For the best texture, refrigerate it overnight.
This resting time allows the biscuits to absorb some of the creamy filling while the entire cake becomes firm enough to cut into clean slices.
7. Serve
Remove the cake from the refrigerator shortly before serving.
Cut it into square portions using a sharp knife.
For cleaner cuts, wipe the knife with a warm, damp cloth between slices.
Serve cold and enjoy the layers of softened biscuits, creamy milk chocolate mousse, and rich dark chocolate ganache.
Best Tips
Use very cold heavy cream and mascarpone when preparing the chocolate cream. This helps the mixture become thick and stable.
Allow the melted milk chocolate to cool before incorporating it into the whipped cream. Chocolate that is too hot can cause the cream to lose its volume.
Dip the biscuits very quickly in the milk. Over-soaking them can make the finished cake too soft and difficult to slice.
For neat layers, spread the chocolate cream evenly after every biscuit layer.
Let the ganache cool slightly before pouring it over the cake. It should be fluid enough to spread but not extremely hot.
For the cleanest slices, refrigerate the cake overnight rather than serving it after only a few hours.
Best Ingredient Options
Petit Beurre-style biscuits work particularly well because their rectangular shape makes them easy to arrange into neat layers.
You can use good-quality milk chocolate for a sweeter and creamier mousse.
For a deeper chocolate flavor, choose dark chocolate with around 50–70% cocoa for the ganache.
Use full-fat mascarpone and heavy cream for the richest texture and best stability.
Recipe Variations
For a stronger chocolate flavor, replace part of the milk chocolate with dark chocolate in the mousse.
For a coffee-chocolate version, add a small amount of instant espresso powder to the melted chocolate.
For a hazelnut variation, spread a thin layer of hazelnut chocolate spread between some of the biscuit layers.
You can also add finely chopped toasted hazelnuts between the layers for extra crunch.
For a festive finish, decorate the ganache with chocolate shavings, cocoa powder, chopped nuts, or small chocolate curls.
What to Serve With
Serve this cake on its own for a rich and indulgent dessert.
A cup of coffee or espresso pairs especially well with the chocolate flavors.
For a lighter presentation, serve each slice with a few fresh strawberries or raspberries.
A small spoonful of lightly whipped cream can also complement the dark chocolate ganache.
Make-Ahead Instructions
This dessert is ideal for making ahead.
Prepare the entire cake the day before serving and keep it covered in the refrigerator overnight.
The additional chilling time allows the biscuits to soften and the layers to set properly, making the cake easier to cut and serve.
Storage
Keep the cake covered and refrigerated.
It is best enjoyed within 3–4 days for the freshest flavor and texture.
Because the cake contains mascarpone and dairy cream, it should not be left at room temperature for extended periods.
Reheating
This is a no-bake dessert and should not be reheated.
Simply remove it from the refrigerator shortly before serving.
Freezing
The assembled cake can be frozen, although the texture of the mascarpone cream may change slightly after thawing.
If freezing, cover it very well and freeze for up to 1 month.
Thaw it slowly in the refrigerator overnight before serving.
Avoid thawing the cake at room temperature, as the dairy-based filling should remain properly chilled.
Common Mistakes to Avoid
Do not soak the biscuits for too long. A quick dip is enough because they will continue softening as the cake rests.
Do not add hot melted chocolate directly to the whipped cream. Let it cool first to prevent the cream from becoming runny.
Do not boil the cream aggressively when making the ganache. Gentle heating is sufficient.
Do not rush the chilling stage. The cake needs several hours in the refrigerator to develop the right consistency.
Do not cut the cake immediately after adding the ganache. Allow enough time for the layers to firm up.
Nutrition Estimate
The following values are approximate and will vary depending on the specific brands and quantities used.
| Nutrient | Estimated Amount per Serving |
| Calories | 450–520 kcal |
| Carbohydrates | 40–50 g |
| Protein | 6–8 g |
| Fat | 28–34 g |
| Saturated Fat | 16–20 g |
| Sugar | 22–30 g |
| Fiber | 2–4 g |
| Sodium | 150–250 mg |
Frequently Asked Questions
Can I make this cake the day before?
Yes. In fact, preparing it the day before is recommended. Overnight refrigeration gives the biscuits enough time to soften and allows the cream layers to set properly.
How long should the biscuits be dipped in milk?
Dip each biscuit for only a moment, just long enough to lightly moisten it. The biscuits should not become saturated.
Can I use dark chocolate instead of milk chocolate?
Yes. Dark chocolate can be used in the mousse if you prefer a less sweet and more intense chocolate flavor.
Can I use another type of biscuit?
Yes. You can use other plain rectangular tea biscuits or similar cookies that can be arranged into layers.
Why is my chocolate cream too runny?
The cream may not have been whipped enough, the ingredients may have been too warm, or the melted chocolate may have been added while it was still hot. Refrigeration will also help the mixture firm up.
Can I decorate the cake?
Absolutely. Chocolate curls, grated chocolate, cocoa powder, chopped hazelnuts, strawberries, raspberries, or small chocolate decorations all work beautifully.
How long does the cake need to chill?
It needs at least 4 hours, but overnight chilling is ideal for the best texture and easiest slicing.
Final Thoughts
This No-Bake Chocolate Biscuit Cake is an easy dessert that delivers an impressive result with simple ingredients. The combination of tender biscuit layers, creamy milk chocolate filling, and glossy dark chocolate ganache makes every slice rich, smooth, and satisfying.
Because it can be prepared ahead of time and requires no oven, it is an excellent choice for birthdays, holidays, family gatherings, or a simple weekend dessert.
For the best result, give the cake plenty of time to chill overnight before slicing and serving.