Prince William’s Chocolate Biscuit Cake. In honour of the royal wedding here’s a favourite of the entire British royal family and was chosen by the Prince as his grooms cake for the wedding.

Prince William’s Chocolate Biscuit Cake
Prince William’s Chocolate Biscuit Cake
The inspiration for this chocolate biscuit cake came when I went for a stroll downtown with the kids a couple of days ago. We came up with the idea to make Prince William’s groom’s cake which he has requested be served at the wedding reception.
Apparently, this easy no-bake refrigerator cake is a childhood indulgence of his and a particular favourite of the entire royal family. With this idea in mind, we dropped into Fat Nanny’s grocery store on Duckworth Street.
There, I procured the necessary Lyle’s golden syrup and a large sleeve of McVities original digestive biscuits. Both Lyle’s and McVities are venerable brands in the UK, which adds a little extra authenticity to the recipe on this occasion.

I use good quality dark chocolate chips at about 50% cocoa in this recipe but semisweet chips can also be used.
Golden syrup is a little difficult to come by in these parts, so I would use dark corn syrup as a substitute. Any brand of digestive biscuits will do.
Dark chocolate is the way to go with this recipe but you can mix semisweet and dark chocolate if you like the chocolate flavour to be a little lighter.
I’ve also read numerous versions of this recipe online that include such ingredients as dried cherries, and roasted nuts. I even saw one ingredient I might just try the next time I make this; broken Crunchie bars!
There’s lots of room for experimentation with this recipe, so go discover your own favourite version.
2019 update
We have now downsized this large recipe to be made as Chocolate Biscuit Cookie Bars. Now you have two delicious opens depending upon your needs.
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Prince William's Chocolate Biscuit Cake
Prince William's Chocolate Biscuit Cake - In honor of the royal wedding here's a favorite of the entire British royal family and was chosen by the Prince as his grooms cake for the wedding.
Ingredients
- 2 pounds dark chocolate, , roughly chopped (about 50% cocoa)
- 1 pound unsalted butter
- pinch salt
- ¼ cup whipping cream
- ⅓ cup golden syrup
- 1 pound digestive biscuits, , broken by hand into postage stamp sized pieces
For the Chocolate Ganache
- ½ cup whipping cream
- 1 tbsp corn syrup
- 8 ounces dark chocolate chopped
Instructions
- Melt the butter over medium low heat.
- Add the chocolate and salt and continue over medium low heat until the chocolate is fully melted.
- Remove from heat and stir in the whipping cream and golden syrup until smooth.
- Fold in the broken biscuits and pour into a 9 inch spring form pan that has been lined with plastic wrap or parchment paper.
- Chill in the fridge for at least 3 hours or overnight.
- Remove from pan and glaze with chocolate ganache.
To make the Chocolate ganache
- Scald the cream in the microwave until almost boiling.
- Pour over chocolate in a small bowl and let stand for five minutes.
- Stir until smooth then stir in the corn syrup.
- Pour over the cooled biscuit cake using a spatula to help cover it evenly.
Notes
Total time includes chilling time for the cake. it is best to make this dessert a day ahead.
The nutritional information provided is automatically calculated by third party software and is meant as a guideline only. Exact accuracy is not guaranteed. For recipes where all ingredients may not be used entirely, such as those with coatings on meats, or with sauces or dressings for example, calorie & nutritional values per serving will likely be somewhat lower than indicated.
Nutrition Information
Yield
24Serving Size
24 servingsAmount Per Serving Calories 526Total Fat 37gSaturated Fat 22gTrans Fat 0gUnsaturated Fat 13gCholesterol 55mgSodium 75mgCarbohydrates 46gFiber 4gSugar 33gProtein 4g
The nutritional information provided is automatically calculated by third party software and is meant as a guideline only. Exact accuracy is not guaranteed. For recipes where all ingredients may not be used entirely, such as those with coatings on meats, or with sauces or dressings for example, calorie & nutritional values per serving will likely be somewhat lower than indicated.
Prof
Saturday 11th of June 2022
Hi - William's cake used Rich Tea biscuits, not digestives. They are much lighter and brittler and make the cake much lighter to eat. I appreciate historical accuracy isn't crucial, but I'd find a digestive version of this too rich and solid (and actually have never seen one).
Ocean
Saturday 24th of July 2021
Are you sure a pound of butter?
Penny Dodd
Wednesday 21st of July 2021
Will you clarify the amount of butter, please. The cake calls for 1 pound (which is 2 cups), and the recipe for the squares reduces the ingredients by half. Except for the butter, which is quartered, to 1/2 cup. Which I amount of butter is correct? (I assume the lesser amount.)
Sandy
Thursday 8th of April 2021
I use Malte Milk Biscuits & Milk Chocolate which has always proved to be a winning combination
Hazel
Tuesday 29th of September 2020
You way overcomplicated this. It's refrigerator cake, and it requires two ingredients only: milk chocolate, and digestive biscuits. Bash the digestive biscuits into small pieces, melt the chocolate in a double boiler (or Pyrex bowl over a saucepan), stir the biscuit pieces into the chocolate, pour the mixture into a cake tin, smooth the top, pop it in the fridge or freezer overnight. In the morning, carefully cut into small rectangles with a sharp knife. That's how it's traditionally done in England.