Sour orange pie is a traditional Florida citrus custard pie made with sour orange juice. Prepared like key lime pie, it has a creamy texture and a bright, tangy flavor balanced by a graham cracker crust.
In a large mixing bowl, combine the sweetened condensed milk and egg yolks. Mix until fully combined.
Add the sour orange juice, and once again mix until fully combined.
Pour the filling into your prepared graham cracker crust.
Bake for 25 to 30 minutes, or until very tiny cracks begin to appear around the edges of the pie.
Chill the pie for at least 3 hours in the refrigerator so the filling can fully set before serving.
Finish with 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 sour orange pie 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.
Notes
Some Notes on Sour Oranges:
Sour oranges are sometimes sold as Seville oranges, marmalade oranges, or bitter oranges.
Sour oranges have less juice than navel oranges. You'll need about 8 oranges to yield the 1 cup of sour orange juice for this recipe.
If you can't find sour oranges, you can substitute a mixture of 1/2 cup of orange juice, 1/4 cup of lemon juice, and 1/4 cup of grapefruit juice.