Key lime pie is a glass-green sweet and sour dessert originating from the Florida Keys. It consists of intensely aromatic Key lime juice, condensed milk, and eggs that are mixed together into a custard. The custard is poured into a buttery crust made from graham crackers and topped with sweet whipped cream.
The spicy and acidic flavors of the limes provide a great contrast to sugar and sweet cream. Key lime, also known as citrus aurantifolia, Mexican lime, and West Indian lime is a fruit indigenous to Malaysia, and it has been connected to Florida since the 1830s when a botanist named Henry Perrine started planting them on Florida's Indian Key.