Yield: approximately 8 servings
* 1 1/2 cups all-purpose flour
* 1 cup superfine sugar
* 1 teaspoon baking powder
* 1/2 teaspoon baking soda
* 1/3 cup best-quality cocoa
* 1 1/2 sticks soft unsalted butter
* 2 large eggs
* 2 teaspoons good-quality vanilla extract
* 2/3 cup sour cream
* Special equipment: 2 (each 8-inch diameter) layer tins with
removable bases, buttered
* 6 ounces good-quality semisweet chocolate, broken into small pieces
* 3/4 stick unsalted butter
* 2 1/2 cups confectioners' sugar
* 1 tablespoon light corn syrup
* 1/2 cup sour cream
* 1 teaspoon good-quality vanilla extract
* Sugar flowers, to decorate, optional
Take everything out of the refrigerator so that all ingredients can
come room temperature.
Preheat the oven to 350 degrees F.
Put all the cake ingredients: flour, sugar, baking powder and soda,
cocoa, butter, eggs, vanilla, and sour cream into a food processor and
process until you have a smooth, thick batter. If you want to go the
long way around, just mix the flour, sugar and leavening agents in a
large bowl and beat in the soft butter until you have a combined and
creamy mixture. Now whisk together the cocoa, sour cream, vanilla, and
eggs and beat this into your bowl of mixture.
Divide this batter, using a rubber spatula to help you scrape and
spread, into the prepared tins and bake until a cake tester comes out
clean, which should be about 35 minutes, but it is wise to start
checking at 25 minutes. Also, it might make sense to switch the 2
cakes around in the oven halfway through cooking time. Remove the
cakes, in their tins, to a wire rack and let cool for 10 minutes
before turning out of their tins. Don't worry about any cracks as they
will easily be covered by the frosting later.
To make this icing, melt the chocolate and butter in a good-sized bowl
either in the microwave or suspended over a pan of simmering water. Go
slowly either way: you don't want any burning or seizing.
While the chocolate and butter is cooling a little, sieve the
confectioners' sugar into another bowl. Or, easier still, put the
icing sugar into the food processor and blitz to remove lumps.
Add the corn syrup to the cooled chocolate mixture, followed by the
sour cream and vanilla and then when all this is combined whisk in the
sieved confectioners' sugar. Or just pour this mixture down the funnel
of the food processor onto the powdered sugar, with the motor running.
You may need to add a little boiling water, say a teaspoon or so, or
indeed some more confectioners' sugar, depending on whether you need
the frosting to be thiner or thicker. It should be liquid enough to
coat easily, but thick enough not to drip off.
Choose your cake stand or plate and cut 4 strips of baking parchment
to form a square and sit 1 of the cakes, uppermost (i.e. slightly
domed) side down.
Spoon about 1/3 of the frosting onto the center of the cake-half and
spread with a knife or spatula until you cover the top of it evenly.
Sit the other cake on top, normal way up, pressing gently to sandwich
the 2 together.
Spoon another 1/3 of the frosting onto the top of the cake and spread
it in a swirly, textured way (though you can go for a smooth finish if
you prefer, and have the patience). Spread the sides of the cake with
icing and leave a few minutes until set, then carefully pull away the
I love to dot the top of this with sugar pansies, and you must admit,
they do look enchanting, but there really is no need to make a
shopping expedition out of it. Anything, or indeed nothing, will do.