A creamy chocolate haupia pie made with two smooth layers, rich chocolate haupia on the bottom and classic coconut haupia on top, all set in a fully baked pie crust. The pie chills until firm for clean slices and is finished with a layer of whipped cream for a cool and refreshing Hawaiian dessert.
In a 4 quart pot, whisk together the cornstarch, sugar, and salt.
Add ½ cup of the milk and whisk until smooth.
Add the rest of the milk along with the coconut milk, then whisk everything together thoroughly. If you notice any lumps, strain the mixture through a fine mesh strainer to create a smooth base.
Place the pot over low heat and whisk constantly while the mixture cooks. Continue whisking until the haupia thickens and reaches a thick, pudding-like consistency. This process usually takes 15 to 20 minutes and is essential for helping the pie set properly.
Remove the pot from the heat and divide the haupia evenly into two bowls, about 2 cups each.
In one of the bowls, whisk the chopped chocolate into the hot haupia until the chocolate melts completely and the mixture is smooth.
Pour the chocolate haupia into your prepared pie shell and spread it evenly with an offset spatula or the back of a spoon.
Carefully pour the remaining plain haupia over the chocolate layer. Gently spread the top layer until it is even and smooth using an offset spatula or spoon.
Press a piece of plastic wrap directly onto the surface of the haupia to prevent a skin from forming as it cools.
Chill the pie in the refrigerator for at least 3 hours or overnight so the filling fully sets.
Make the Whipped Cream
In a stand mixer fitted with the whisk attachment, combine the cold heavy cream, sifted powdered sugar, and vanilla extract. Whip on medium-high speed until stiff peaks form and the cream holds its shape.
Spread the whipped cream evenly over the chilled haupia filling using an offset spatula or the back of a spoon. For a more decorative look, transfer it to a piping bag and pipe rosettes or swirls across the top.