From Karen Burns-Booth on greatbritishchefs.com
(you can adjust this)
Place the chocolate pieces into a bowl and sit the bowl over some simmering water – melt it gently until smooth, mixing all the time
Blend the milk with the cocoa powder and chilli powder until it is a smooth paste and add to the melted chocolate. Mix well
Beat the egg yolks and add them to the chocolate mixture. Set the bowl over some simmering hot water and cook gently for about 5-7 minutes, stirring all the time until the mixture has thickened. Check the chilli heat level and add some more chilli powder if desired
Whisk the egg whites until they are stiff, then add the sugar and whisk until the eggs and sugar are glossy. Gently fold them into the chocolate mixture with a metal spoon
Divide the mixture between 4 bowls or ramekins and scatter the chocolate chips over the top, as well as a small sprinkling of chilli powder. Chill until set and ready to serve