Key Lime Pie
Florida Keys, United States. Key lime pie is the official state pie of Florida. It developed in the 19th century among sponge fishermen and other Key residents as a practical recipe — condensed milk (shelf-stable in the days before refrigeration) and locally abundant Key limes. The filling sets without baking, which was practical in a region with limited cooking facilities.
Key lime pie from the Florida Keys requires genuine Key limes (Citrus aurantiifolia) — smaller, more aromatic, and more intensely sour than Persian limes. The filling is a simple mixture of Key lime juice, sweetened condensed milk, and egg yolks that sets without baking (the acid 'cooks' the egg proteins in the condensed milk). The result is dense, creamy, intensely sour-sweet, and must be served cold. Topped with a thin layer of whipped cream. No green food colouring — genuine Key lime pie is pale yellow.
Cold, black Cuban coffee (cortadito) alongside Key lime pie — the bitterness of the coffee and the intense sourness of the lime filling are complementary rather than competing. Or a glass of cold whole milk for the straightforward American dessert pairing.
{"Key lime juice: freshly squeezed from Key limes. The bottled Key lime juice (Nellie and Joe's brand) is an acceptable substitute when fresh Key limes are unavailable","The filling: 4 egg yolks, 1 can sweetened condensed milk, and 120ml Key lime juice — whisk together. The acid in the lime juice immediately begins denaturing the egg proteins and thickening the condensed milk","Graham cracker crust: crushed graham crackers, butter, and a small amount of sugar, pressed firmly into the pie pan and baked at 180C for 10 minutes before filling","Bake at 165C for 15 minutes: just until the filling is set at the edges but jiggles slightly in the centre. Over-baked filling is rubbery","Chill completely: minimum 4 hours, ideally overnight. The filling continues to set as it chills","Whipped cream: applied just before serving, not stored on the pie — it weeps and softens the crust"}
RECIPE: Serves: 8 | Prep: 20 min | Total: 180 min --- 200g all-purpose flour 100g cold unsalted butter — cubed 5g kosher salt 10ml ice water 4 large egg yolks 400ml sweetened condensed milk 120ml fresh key lime juice — strained 15g key lime zest 240ml heavy cream 15g powdered sugar --- 1. Cut butter into flour and salt until breadcrumb texture; add ice water and form disk. 2. Chill dough 30 minutes; press into 23cm pie tin. 3. Prick crust with fork; blind bake at 190°C for 12 minutes; cool slightly. 4. Whisk egg yolks, condensed milk, key lime juice, and zest until smooth and homogeneous. 5. Pour filling into crust; bake at 170°C for 15 minutes until slightly firm but center jigggles slightly. 6. Cool to room temperature, then refrigerate minimum 120 minutes. 7. Whip heavy cream with powdered sugar; dollop before service. The moment where Key lime pie lives or dies is the chill — after baking, the pie must be refrigerated for a minimum of 4 hours before slicing. At 1 hour, the filling is still soft and will not hold a clean slice. At 4 hours, the filling has set to a dense, creamy consistency that slices cleanly. At 12 hours, the flavours have integrated and the pie is at peak. The Key lime flavour actually intensifies overnight as the acids continue interacting with the condensed milk proteins.
{"Using Persian limes: the flavour is completely different — more bitter, less aromatic, and less sour. Key lime pie requires Key lime juice","Green food colouring: genuine Key lime pie is pale yellow. Green colouring indicates a poor-quality or commercial product","Over-baking: the filling becomes rubbery and grainy when over-cooked"}
- French tarte au citron (lemon tart — the European sour citrus tart tradition); Brazilian torta de limão (lime pie — the Brazilian cousin with different proportions); Filipino buko pie (coconut cream pie — the Filipino tropical fruit pie tradition).
Common Questions
Why does Key Lime Pie taste the way it does?
Cold, black Cuban coffee (cortadito) alongside Key lime pie — the bitterness of the coffee and the intense sourness of the lime filling are complementary rather than competing. Or a glass of cold whole milk for the straightforward American dessert pairing.
What are common mistakes when making Key Lime Pie?
{"Using Persian limes: the flavour is completely different — more bitter, less aromatic, and less sour. Key lime pie requires Key lime juice","Green food colouring: genuine Key lime pie is pale yellow. Green colouring indicates a poor-quality or commercial product","Over-baking: the filling becomes rubbery and grainy when over-cooked"}
What dishes are similar to Key Lime Pie?
French tarte au citron (lemon tart — the European sour citrus tart tradition); Brazilian torta de limão (lime pie — the Brazilian cousin with different proportions); Filipino buko pie (coconut cream pie — the Filipino tropical fruit pie tradition).