a pinch of salt.
INSTRUCTIONS :
STEP I : Beat egg yolks in a medium bowl , add cornstarch , cocoa , sugar , a pinch of salt then add milk gradually.
STEP II : Stir the mixture in a pot over med-high heat, cook until thick, beating it smooth.
STEP III : Pour into a pre-baked pie shell , and let it cool in fridge for 30 minutes.
P.S:You can use whipped cream for topping .
ENJOY !!!