5-Ingredient No-Bake Chocolate Biscuit Cake
This no-bake chocolate biscuit cake is the dessert you reach for when you want something deeply chocolatey without turning on the oven. It comes together in about 15 minutes of hands-on time, then the fridge does the rest.
Chunks of buttery biscuit are suspended in a rich, almost fudgy chocolate mixture. It’s the kind of cake that tastes even better the next day.
Why This No-Bake Cake Works
I keep coming back to this recipe because it’s nearly impossible to get wrong. No creaming butter and sugar, no checking for doneness. You melt, stir, press into a pan, and chill.
The texture lands between a chocolate bar and a dense truffle, with crunchy biscuit bits in every bite. A little golden syrup keeps the chocolate glossy and sliceable right from the fridge.
It’s my go-to for last-minute gatherings because it looks impressive but asks for so little. Dust it with cocoa or pile on some berries, and you’ve got a dessert that feels far fancier than it is.
Ingredients
- 200 g digestive biscuits: plain tea biscuits or graham crackers work too
- 100 g unsalted butter: plus a little extra for greasing the pan
- 200 g dark chocolate (70% cocoa): choose one you’d happily eat on its own
- 3 tbsp golden syrup: light corn syrup or honey can step in (honey sets firmer)
- Pinch of flaky salt: to sharpen the chocolate
Variations / Substitutions
- Biscuits: Rich tea, Marie, or graham crackers all work. For a gluten-free version, use your favorite gluten-free plain cookie.
- Chocolate: Swap up to half the dark chocolate with milk chocolate for a sweeter cake. White chocolate gives a very different result; if using, reduce the syrup by half.
- Syrup: Golden syrup adds a subtle caramel note; light corn syrup is the closest substitute. Honey introduces a floral twist but makes the cake slice a bit firmer.
- Add-ins: Fold in a handful of toasted chopped hazelnuts, dried cherries, or mini marshmallows after mixing the biscuits into the chocolate.
For another effortless chocolate treat, try our chocolate refrigerator slice.
How to Make 5-Ingredient No-Bake Chocolate Biscuit Cake
Step 1: Crush the Biscuits
Place the 200 g digestive biscuits in a large zip-top bag and crush them with a rolling pin for about 2 minutes until you have a mix of fine crumbs and small chunks no bigger than a pea. You can also pulse them in a food processor, but stop before it turns to dust.
You want uneven pieces so the cake has some crunch. Set the crushed biscuits aside.
Step 2: Melt the Chocolate Mixture
Grease an 8-inch (20 cm) round cake pan or springform pan with a little butter and line the base with parchment. In a heatproof bowl set over a pan of barely simmering water, combine the 100 g unsalted butter, 200 g dark chocolate (broken into pieces), and 3 tbsp golden syrup. Stir gently until everything is melted and smooth, about 4 minutes.
The mixture will look glossy and thick. Remove from the heat, stir in the pinch of flaky salt, and let it cool for 2 minutes so it doesn’t melt the biscuits completely when mixed.
Step 3: Combine and Press Into the Pan
Tip the crushed biscuits into the chocolate mixture and fold through with a spatula until every crumb is coated. Scrape the mixture into the prepared pan and press it down firmly with the back of a spoon or the bottom of a glass for about 1 minute, until the surface is compact and even. You want it pressed together but not squashed into a solid brick.
The top should look smooth. If you like, scatter over a few extra biscuit crumbs or chopped nuts for decoration before chilling.
Step 4: Unmold and Slice the Cake
Cover the pan with cling film and refrigerate for at least 4 hours, or overnight if you have the time. To unmold, run a knife around the edge, release the springform or invert the pan onto a plate. Peel off the parchment.
Slice with a sharp knife dipped in hot water (wipe between cuts). Serve straight from the fridge; the cake keeps its shape at room temperature but stays fudgy when cold. Dust with cocoa powder or pile on some fresh raspberries and it’s ready.
Tips for the Best Chocolate Biscuit Cake
- Use a springform pan if you have one. It makes unmolding effortless and keeps the sides neat.
- Line the pan with overhanging strips of parchment paper. They act as handles to lift the cake out cleanly, especially if you’re using a regular cake pan.
- The biscuit size matters. If you crush them too finely, the cake loses its signature crunch; leave some pieces around the size of a pea.
The setting time and thickness will vary with your pan.
| Pan size | Approximate thickness | Minimum chill time |
|---|---|---|
| 7-inch (18 cm) | Thicker (about 2 inches) | 6 hours |
| 8-inch (20 cm) | Standard | 4 hours |
| 9-inch (23 cm) | Thinner | 3 hours |
Keeping the Cake Fresh
Store the cake tightly wrapped in the fridge for up to 5 days. It doesn’t need to come to room temperature before serving; the texture is best when chilled. You can also freeze slices for up to a month; thaw overnight in the fridge.
What to Serve With This Chocolate Biscuit Cake
This cake is rich, so a dollop of lightly whipped cream or crème fraîche cuts through the sweetness. Fresh raspberries or strawberries add a bright, tart contrast that makes each bite feel balanced.
Frequently Asked Questions
My cake crumbled when I sliced it. What went wrong?
You likely didn’t press the mixture firmly enough into the pan, or you sliced it before it was fully chilled. Give it the full 4 hours in the fridge and press more firmly next time.
Can I make this cake vegan?
Yes. Use a dairy-free block butter (not the spreadable kind) and a dark chocolate that contains no milk. The set should be just as firm.
Why did my chocolate mixture turn grainy?
The chocolate got too hot or a drop of water splashed in. Whisk in a teaspoon of neutral oil or vegetable shortening to bring it back to a smooth texture.
Can I use milk chocolate instead?
You can, but the cake will be much sweeter and may set a little softer. I prefer using at least 70% dark chocolate for the best slice and depth of flavor.
5-Ingredient No-Bake Chocolate Biscuit Cake Recipe
Ingredients
Method
- Crush the biscuits in a bag with a rolling pin for about 2 minutes until you have a mix of crumbs and pea-sized pieces. Set aside.
- Grease an 8-inch pan and line with parchment. Melt butter, chocolate, and golden syrup together in a heatproof bowl over simmering water, stirring until smooth, about 4 minutes. Stir in salt and cool for 2 minutes.
- Fold the crushed biscuits into the chocolate until coated. Press firmly into the prepared pan for about 1 minute until compact and even.
- Cover and refrigerate for at least 4 hours. Unmold, slice with a warm knife, and serve.
