Soft, moist chocolate cake that can be a wonderful base for cream or ganache. Recipe (6″ round tin) 15g varlhona cocoa powder 35g hot water 20g cold milk 10g corn starch 45g caster sugar 3 egg yolks 1/4 tsp salt 35g cooking oil 45g cake flour 3 egg whites 1/8 tsp cream of tartar Handful…