In a large saucepan, combine cornstarch, sugar, salt, and 1 cup of coconut milk.

Mix into a smooth paste, ensuring no lumps remain.

Over low heat, add the remaining coconut milk.

Continuously stir the mixture to prevent curdling until it thickens into a pudding consistency.

For a firmer, luau-style haupia, increase cornstarch by 5 tablespoons.

While still warm, pour the mixture into a sheet pan and smooth with an offset spatula.

Chill until set, then cut into squares.

Spoon the haupia into a container or individual bowls.

Serve warm or chilled, plain or with fruit.

Layer with chocolate pudding for a parfait.