400g dark chocolate , 360g unsalted butter, 360 caster sugar , 6 tbsp plain flour, 6 eggs  & icing sugar for serving.

Preheat the oven to 200C.

Melt the chocolate, butter, and sugar in a double boiler over a gentle heat , stirring often until the mixture is smooth then remove from the heat.

Add the flour and stir the mixture until smooth.

Add the eggs one at a time , beating the mixture  well with a whisk or an electric beater after each addition.

Pour  the mixture into a lined 20cm square cake tin.

Bake the cake  in the oven, centre shelf for 15 mins , then turn the oven down to to 150C  and bake for a further 40 minutes.

Turn off the oven , leave the door closed and allow the cake to slowly cool.

To serve , turn the cake out of the tin and dust with icing sugar.

Anna’s Tips

Sometimes I add a pinch of ground cinnamon  and cardamon to spice it up.

If you slightly under-cook the cake it will set like fudge in the fridge.

To decorate place three spoons across the top of your cake before sprinkling with icing sugar for a pretty decoration.