Custard for the triffle

1 can condensed milk

3 cans evaporated milk

6 eggs yolk

2 tsp vanilla essence

6 tbsp corn flour

-          Heat evaporated milk in a pot, not boiled

-          Mix eggs yolk, vanilla,  corn flour and some condensed milk in a bowl

-          Add some of the hot evaporated milk to the egg yolk mixture and mix well (tampering the eggs yolk mixture)

-          Pour the egg yolk mixture and the rest of condense milk into the hot milk (medium flame)

-          Stir until custard ticken.