Quote:
Originally Posted by
Relznik
Here's the reply I got from my aunt:
Someone's been watching Oprah!! 
Chocolate Biscuit Cake
Recipe courtesy of Darren McGrady (former chef to Queen Elizabeth II)
http://www.oprah.com/food/Chocolate-Biscuit-Cake-Recipe (You'll find this recipe and others by Darren McGrady)
1/2 teaspoon soft butter
8 ounces *McVities rich tea biscuits - In USA use a plain cookie like a Sweet Marie or an arrowroot (or something just slightly richer than arrowroot). A rich tea biscuit as indicated in this recipe is a plain round crispy cookie (biscuit in the UK) less flaky than a digestive, but sweeter than an arrowroot. I would think that a plain packaged sugar cookie would do (not the soft kind).
4 ounces soft butter
1/2 cup sugar
4 ounces dark chocolate
1 egg, beaten
8 ounces dark chocolate for icing
1 ounce white chocolate for decoration (the online recipe and picture shows dark chocolate decoration)
1. Line the base of a spring form pan with silicone paper, and butter the sides. Break the biscuits into almond-sized pieces and set aside.
2. Cream the sugar and butter in a bowl. Melt 4 ounces dark chocolate and mix with butter, add the beaten egg and mix well. Add biscuits and coat well.
3. Pour into the pan, making sure the bottom is well covered as this will be the top of the cake when it is unmolded. Let set in a fridge for three hours. Let partially warm outside of the fridge while 8 ounces dark chocolate and white chocolate are melted. Flip cake and drizzle chocolate on top.
If you click on the link, you'll see a pic of a finished cake (although Prince William's cake wasn't decorated quite as basically as this!

)
The recipe on Oprah is from Daren McGradys book, but the instructions in the end of step 1 and beginning of step 2 have been typed incorrectly by whomever she had add it to her website, for her fans. Nothing terribly out of whack but enough to confuse many of the commentors on the recipe.
Its also being mentioned on a few blogs that Oprah has the instructions incorrect and should have it changed.
From Darren McGrady's book.... the correct instructions on how to incorporate the butter, sugar, chocolate and beaten egg.
Cream the butter and sugar in a bowl until the mixture is a light lemon color.
Melt the 4 ounces of dark chocolate in a double boiler. Add the butter and sugar mixture to the chocolate, stirring contstantly. Add the egg and continue stirring. Fold in the biscuit pieces until they are all coated with the chocolate mixture.