Easy Key Lime Pie
Tart Key lime custard in a buttery graham crust with whipped cream, chilled for summer and holiday tables.
Updated: Oct 7, 2026
Why you'll like it
- Ready in about 4 hr 30 min (includes chilling).
- Serves 8 — easy to halve or double.
- Easy level — everyday equipment only.
- Storage, freezing and reheating covered below.
This Easy Key Lime Pie recipe takes 4 hr 30 min (includes chilling) and makes 8 servings. Key lime pie is a Florida-born dessert served chilled across the USA, pairing tart lime custard with a sweet, buttery graham cracker crust.
Helpful guides
Instructions
Heat the oven to 350 degrees and set a 9-inch pie plate on a baking sheet for easy transfer. Stir the crumbs, sugar, and melted butter until the texture resembles damp sand that clumps when squeezed. Firm, even packing prevents a crumbly base that falls apart during slicing and serving.
Press the mixture firmly over the bottom and up the sides of the plate with a flat-bottomed cup. Build the rim slightly thicker, since edges brown first and support each slice. Bake 10 minutes until fragrant and lightly golden, then cool 5 minutes while whisking the filling.
Whisk the condensed milk, lime juice, yolks, and salt in a large bowl until completely smooth and slightly thickened. The acid begins to set the mixture even before baking, which is normal. Pour the filling into the warm crust and smooth the top gently without pressing down.
Bake 15 to 18 minutes until the edges look set and the center still trembles slightly when nudged. The pie finishes setting as it cools, so a fully firm center at this stage means overbaking. A slight jiggle like gelatin signals the creamy texture that slices cleanly after chilling.
Cool the pie on a wire rack for 1 hour until it reaches room temperature, then refrigerate uncovered until cold. Cover loosely and chill at least 4 hours or overnight for the firmest slices. Slow, complete chilling matters more than extra bake time for clean cuts and smooth mouthfeel.
Whip the cream to soft peaks just before serving and spread or pipe it over the cold pie. Top with thin lime wheels and cut with a warm dry knife, wiping clean between slices. Serve chilled directly from the refrigerator, returning leftovers promptly so the custard stays cold and safe.
Troubleshooting — fixes, not repeats
- If the filling stays runny after chilling, it underbaked or the juice ran over. Bake until only the center jiggles, measure juice at exactly 0.75 cup, and chill a full 4 hours. Extra juice thins custard beyond what yolks and condensed milk can set.
- If the crust turns soggy, it skipped the pre-bake or met hot filling while raw. Bake the empty shell 10 minutes first and pour filling into the warm crust. Buttery crumbs need that head start to crisp.
- If the flavor tastes flat or one-note, the juice was mild or salt was skipped. Add the full 0.25 teaspoon of salt, taste the filling before baking, and add 1 tablespoon more juice if tartness reads weak. Bottled Key lime juice varies widely in strength.
- If the surface cracks or browns, the pie overbaked or sat too high in the oven. Pull it while the center still trembles, bake on the middle rack, and avoid broiling the top for color. Whipped cream covers small flaws completely at serving time.
Make it your way
- Spicier version: For a frozen icebox version, skip the second bake chill and freeze the cooled pie 6 hours, slicing while firm with a hot knife.
- Old Dhaka style: Fold 1 teaspoon of lime zest into the filling for stronger aroma.
- Swap half the graham crumbs for gingersnap crumbs for warmer spice.
- Top with torched meringue instead of whipped cream for a taller, bakery-style finish on special occasions.
Storage & reheating
Cool leftovers within 2 hours, then refrigerate in a covered container and use within 3 to 4 days. Reheat only the portion you will eat until steaming hot throughout — poultry and reheated rice should reach 165°F (74°C).
Freeze tightly wrapped slices up to 1 month; thaw overnight in the refrigerator.
FAQ
Should I use fresh or bottled Key lime juice?
Both work well. Bottled Key lime juice gives consistent tartness year-round, while fresh juice from about 12 Key limes tastes brighter but varies. Avoid boiling the juice, which dulls aroma. Taste the filling before baking and adjust by 1 tablespoon.
Can I use regular limes instead of Key limes?
Yes. Persian lime juice makes a slightly less floral but still tart pie with the same method and timing. Use the same 0.75 cup measure. Label it lime pie, since Key lime flavor is distinct, though most guests accept the swap.
Why only egg yolks and no whites?
Yolks thicken the filling into smooth custard, while whites add water and foam that turn rubbery when baked. Save the whites for omelets or meringue. Whisk yolks fully into the condensed milk so no streaks remain, which keeps every slice evenly set and glossy.