Anna Louise Chocolate biscuit cake might be the simplest thing on this entire site. You melt chocolate, butter, and golden syrup together, stir in broken biscuits and whatever else you fancy, press into a tin, and refrigerate. That is genuinely the entire recipe.
And yet the result is something that everyone loves without exception. Rich, deeply chocolatey, with the satisfying crunch of biscuit pieces throughout — it is comfort food in its most straightforward, most honest form. Children adore it. Adults who claim to be above such things eat three pieces and then ask what was in it.
This is also famously the favourite cake of the royal family — a chocolate biscuit cake recipe very similar to this one appears at royal celebrations and has done for generations. Whether or not that matters to you, it is a genuinely excellent cake and takes about twenty minutes to make.
Mary Berry’s chocolate biscuit cake uses Rich Tea biscuits — the traditional choice — with dark chocolate, butter, golden syrup, and a handful of extras.
I add glace cherries and a small amount of chopped nuts for texture and colour, but these are optional. The core recipe — chocolate, biscuits, butter, syrup — is what makes it what it is.
Why This Works So Well
Rich Tea biscuits are the ideal biscuit for this recipe. They are slightly dry and sandy in texture, which means they absorb the chocolate mixture without going completely soft — they give crunch and structure rather than disappearing into the chocolate entirely.
The golden syrup does two things. It gives a slight caramel sweetness that complements the dark chocolate beautifully. And it keeps the set cake from becoming too hard and brittle — the syrup stays slightly soft even when cold, giving the cake a slight yielding quality that makes it pleasant to bite through.
Ingredients for Mary Berry Chocolate Biscuit Cake
For the Cake
- 200g dark chocolate (70% cocoa solids), finely chopped
- 100g milk chocolate, finely chopped
- 200g unsalted butter, cut into cubes
- 4 tbsp golden syrup
- 250g Rich Tea biscuits, broken into rough pieces — some small, some larger
- 100g glacé cherries, halved and rinsed
- 50g walnuts or pecans, roughly chopped (optional)
- 1 tsp vanilla extract
For the Chocolate Topping
- 100g dark chocolate (70%), finely chopped
- 25g unsalted butter
Optional Decoration
- Gold or silver edible balls
- Chocolate curls or shavings
- Crystallised violets or rose petals
How to Make Mary Berry Chocolate Biscuit Cake
Step 1 — Prepare the Tin
Line a 20cm round springform tin or a 900g loaf tin with baking parchment, leaving overhang to allow easy lifting. A springform tin gives a round cake that looks elegant. A loaf tin gives something that slices into neat rectangular pieces — equally good for a bake sale or a lunchbox.
Step 2 — Melt the Chocolate, Butter, and Syrup
Place the chopped dark chocolate, milk chocolate, butter cubes, and golden syrup into a large heatproof bowl. Set over a pan of barely simmering water. Stir gently every minute until everything has melted together into a completely smooth, deeply glossy mixture.
Remove from the heat and leave to cool for five minutes — you want it warm but not hot when the other ingredients go in.
Step 3 — Add the Vanilla and Taste
Stir in the vanilla extract. Taste the melted chocolate mixture — it should be rich, slightly bitter from the dark chocolate, and perfectly balanced by the golden syrup. This is the moment to adjust anything.
Step 4 — Add the Biscuits and Extras
Add the broken Rich Tea biscuits, halved glacé cherries, and chopped nuts if using to the warm chocolate mixture. Stir well until every piece is completely coated in the chocolate mixture.
Step 5 — Press Into the Tin
Tip the mixture into the prepared tin. Press down firmly and evenly with the back of a spoon — making sure the mixture goes right to the edges and is compact and even throughout. A firmly pressed cake cuts more cleanly than a loosely packed one.
Step 6 — Make the Chocolate Topping
Melt the dark chocolate and butter together until smooth — either over simmering water or in the microwave in 30-second bursts. Pour over the top of the pressed cake and spread evenly. It should be a thin, glossy layer.
Step 7 — Set in the Fridge
Refrigerate for at least two hours — ideally overnight. The cake needs to be completely cold and firm before it will cut cleanly.
Scatter any decoration over the chocolate topping immediately after pouring, before it sets, so they adhere.
Step 8 — Release and Slice
Lift from the tin using the parchment overhang. Place on a board. Cut with a sharp knife dipped in hot water and wiped between each cut.
My Top Tips For Best Mary Berry Chocolate Biscuit Cake
Break the biscuits by hand rather than crushing them. You want a mixture of small pieces and larger chunks — not a uniform rubble and not big whole pieces. Breaking by hand into rough, irregular sizes gives the most satisfying texture in the finished cake.
Cool the chocolate mixture before adding biscuits. If the chocolate is too hot, it softens the biscuit pieces too much and they lose their crunch. Five minutes of cooling gives the right temperature.
Press firmly into the tin. A compact, firmly pressed cake slices cleanly. A loosely packed one crumbles. Use real force with the back of a spoon and press all the way to the edges.
Refrigerate overnight rather than two hours. Two hours gives a cake that is set but slightly soft. Overnight gives a cake that is completely firm and cuts into perfect, clean-edged slices. Make it the night before — always.
Use a mix of dark and milk chocolate. Dark chocolate alone gives something slightly bitter and serious. Milk chocolate alone gives something too sweet and slightly bland. The combination of 200g dark and 100g milk gives exactly the right balance — rich and chocolatey without being overwhelming.
Serving Suggestions
In thin slices with a cup of strong coffee — perfect. At a children’s party — beloved by everyone between the ages of 4 and 84. At a bake sale — one of the fastest-selling items. As an elegant petits fours with coffee at a dinner party — cut into very small squares and arranged on a plate.
How to Store Mary Berry Chocolate Biscuit Cake
In the fridge: Store in an airtight container for up to 5 days. The cake stays firm and delicious throughout.
In the freezer: Freeze in slices for up to 3 months. Defrost at room temperature for one hour or overnight in the fridge.
Mary Berry Chocolate Biscuit Cake Recipe
Ingredients
Method
- Line a 20cm springform or 900g loaf tin with parchment.
- Melt dark chocolate, milk chocolate, butter, and golden syrup together over barely simmering water — stir gently until completely smooth. Cool 5 minutes.
- Stir in vanilla. Taste and adjust.
- Add broken biscuits, cherries, and nuts. Stir until everything is coated.
- Tip into tin. Press down firmly and evenly.
- Melt topping chocolate and butter until smooth. Pour over the pressed cake — spread evenly. Add decorations immediately before it sets.
- Refrigerate minimum 2 hours — overnight is better. Lift from tin. Slice with a hot wiped knife.
Notes
Frequently Asked Questions
Can I use digestive biscuits instead of Rich Tea?
Yes — digestive biscuits give a slightly more buttery, more substantial result. Rich Tea gives a lighter, crunchier texture that I prefer for this recipe. Both are good.
Can I add other ingredients?
Yes — dried cranberries, mini marshmallows, pistachios, dried apricots, or chocolate chips all work well stirred through the mixture. Keep the total weight of add-ins to about 150 to 200g to maintain the right chocolate-to-additions ratio.
Can I use white or milk chocolate for the whole cake?
Yes — an all-milk-chocolate version is sweeter and softer. An all-white-chocolate version is very different but has devoted fans — it works particularly well with pistachios and dried cranberries.
Why is my cake crumbling when I cut it?
Either it was not refrigerated long enough, or the mixture was too warm when the biscuits were added and the biscuits softened too much. Refrigerate overnight and make sure the chocolate mixture has cooled to warm before the biscuits go in.
Can I make this without golden syrup?
Replace with the same quantity of honey or maple syrup. The flavour will be slightly different — honey gives a more floral note, maple syrup gives a subtle maple sweetness — but both work.
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