Chop the chocolate into small pieces, melt gently in a bowl over a pan of water until smooth
Blend the cocoa and chilli powder with the milk until a smooth paste is formed
Add the melted chocolate and mix well
Beat the egg yolks, add to chocolate mixture
Over the pan of simmering water cook gently for about 5-7 minutes, stirring constantly
Check for taste and add more chilli if desired, remove from heat
Whisk the egg whites until stiff, add sugar, continue to whisk until glossy
Gently fold into the chocolate mixture with a metal spoon
Divide mixture into ramekins and chill until set
4 servings