250g caster sugar
100g chopped white chocolate
100g chopped milk chocolate
190g 70% dark chocolate
115g plain flour
Melt the dark chocolate in a bowl over boiling water. Then melt in the butter. Separately whisk the eggs and sugar together. After the chocolate/butter mix has cooled slightly, add eggs and sugar mix and beat. Finally sieve in the plain flour.
Chop the chocolate into chunks and add them in.
Bake at 180°C for about 25 mins.