MIX COCOA, CORNSTARCH, BEATEN EGG YOLKS; SUGAR AND SALT, THEN ADD MILK GRADUALLY, WHILE STIRRING IN A POT OVER MED-HIGH HEAT. COOK UNTIL THICK, BEATING IT SMOOTH. CREAM PIES TAKE SOME TIME TO THICKEN, SO STIR… AND STIR (10-15 MIN). USING A HEAVY BOTTOM PAN REALLY HELPS. JUST KEEP IT UP UNTIL IT THICKENS. POUR INTO A PRE-BAKED PIE SHELL. PUT IN THE FRIDGE TO CHILL, ADD WHIPPED CREAM IF YOU LIKE :0 OR USE THE LEFTOVER EGG WHITES FOR A MERINGUE TOPPING!