Here's Nigella's 'world's best chocolate ice cream' (as it's called):
Ingredients:
4 egg yolks
130 gr sugar (plus 2 tablespoons)
500 ml full fat milk
100 gr good quality dark chocolate
40 gr good quality cocoa powder
directions:
Whisk the yolks & 130 gr of the sugar in a bowl until thick & creamy, foaming pale ribbons when you lift the whisk
Then bring the milk to the boil & add it to the beaten yolks, pouring slowly & beating all the while
Melt the chocolate in a bowl above (but not touching) some simmering water in a pan
Then whisk this, followed by the cocoa, into the egg & milk mixture
Pour the chocolate-custard mixture into a pan & cook on a low to moderate heat, stirring with a wooden spoon, until everything?s smooth & amalgamated & beginning to thicken (don?t cook until it?s really custard-like, but slightly less)
Put 2 tablespoons of sugar with 2 teaspoons of water into a thick bottomed saucepan & turn the heat to high
Make a caramel: heat this until it?s dark brown & molten (you are after the taste of burnt sugar). As it browns, whisk it into the chocolate custard; don?t worry if it crystallizes on contact as the whisking will dissolve it
Turn into a bowl to cool, then after it's cool, chill in the fridge for about 20 mins (or longer if that?s more convenient) before churning in your ice-cream maker according to instructions
It's divine & really worth the trouble of making the caramel.