Key Lime Pie
To make key lime pie, whisk together key lime juice, sweetened condensed milk, and egg yolks, then pour into a pre-baked graham cracker crust and bake at 350°F for 15 minutes until just set. Chill for at least 2 hours before serving.
Key lime pie should taste like lime first and sweetened condensed milk second. That sounds obvious, but there are plenty of pale green pies out there with the citrus intensity of a scented candle. This one uses fresh key lime juice, key lime zest, egg yolks, and two cans of condensed milk, poured into a graham cracker crust that gets baked long enough to become genuinely crisp before the filling ever arrives.
The filling thickens a little as soon as the lime juice hits the condensed milk, but it still needs 15 minutes at 350°F. Pull it when the edges are set and the center has a small, firm jiggle—not a wave. Overbaking is how a silky pie turns grainy, which is a rough ending for something that required squeezing roughly 20 to 25 tiny limes like you had a personal grievance against them.
Then comes the part nobody wants to hear: chill it for at least two hours. The filling needs that time to finish setting. Soft whipped cream with vanilla goes on only after the pie is cold, and that cool dairy layer gives the tart, concentrated lime flavor somewhere to land. Bright, creamy, crisp underneath, and absolutely not neon green. The limes have suffered enough.
Ingredients
- 1 ½ cups graham cracker crumbs (about 12 full crackers)
- 3 tablespoons granulated sugar
- 6 tablespoons unsalted butter, melted
- ½ teaspoon kosher salt, divided
- 3 large egg yolks
- 1 tablespoon key lime zest (from about 8–10 key limes)
- 1/3 cup fresh key lime juice (from about 20–25 key limes, or bottled Nellie & Joe's)
- 2 cans (14 oz each) sweetened condensed milk
- 1 cup cold heavy whipping cream
- 2 tablespoons powdered sugar
- ½ teaspoon vanilla extract
Instructions
- 1Preheat your oven to 350°F. Combine graham cracker crumbs, granulated sugar, melted butter, and ¼ teaspoon of the salt in a medium bowl. Stir until the mixture looks like wet sand and holds together when pressed between your fingers.
- 2Press the crust mixture firmly and evenly into the bottom and up the sides of a 9-inch pie pan. Use the flat bottom of a measuring cup to compact it — a loose crust is a crust that falls apart when you serve it, and nobody needs that kind of drama.
- 3Bake the crust for 8–10 minutes until it's lightly golden and smells like toasted butter. Remove from oven and let it cool for 5 minutes. Leave the oven on at 350°F.
- 4In a large bowl, beat the egg yolks and key lime zest together with a whisk for about 2 minutes until the yolks are slightly pale and the zest is well incorporated.
- 5Add both cans of sweetened condensed milk and the remaining ¼ teaspoon salt. Whisk until smooth and fully combined.
- 6Add the key lime juice and whisk until the mixture thickens slightly. This is the acid reacting with the condensed milk — it's doing exactly what it's supposed to do.
- 7Pour the filling into the warm (not cold) crust. The filling will be fairly liquid at this point. That's fine.
- 8Bake at 350°F for 15 minutes. The edges should be set and the center should have just a slight jiggle — like a firm Jell-O, not a wave. Do not overbake. An overbaked filling turns grainy and loses the silky texture.
- 9Remove from oven and cool on a wire rack for 30 minutes, then refrigerate uncovered for at least 2 hours, or up to overnight. The pie needs the full chill time to set properly.
- 10When ready to serve, make the whipped cream: beat cold heavy whipping cream, powdered sugar, and vanilla extract with a hand mixer or stand mixer on medium-high until soft peaks form, 2–3 minutes.
- 11Top the pie with whipped cream — either dolloped in the center or piped around the edges — and garnish with thin slices of key lime if you're feeling like you want people to know you tried.
Nutrition Information
Estimated per serving: 1 of 8 servings.
Estimated from the ingredients and quantities in this recipe using standard food-composition values. Brand choices, trimming, cooking loss, optional ingredients, and actual portion size can change the numbers. How we calculate nutrition estimates.
Pro Tips
- If you can find fresh key limes, use them — the flavor is brighter and more floral than bottled juice. But Nellie & Joe's Famous Key West Lime Juice is a genuinely good bottled option and I have used it without shame at multiple family gatherings.
- Do not skip the zest. It carries the aromatic top notes that juice alone can't deliver. If you're using bottled juice, zest a regular lime instead — it's not identical but it helps.
- Pull the pie out of the oven while the center still has a faint jiggle. I know it feels wrong. Do it anyway. The refrigerator is where this pie actually finishes, and the oven does not need to be involved past 15 minutes.
Substitutions
Storage Instructions
Store covered in the refrigerator for up to 4 days. Add whipped cream only to slices you plan to serve immediately — it weeps if left on the pie overnight. The pie can also be frozen (without whipped cream) for up to 1 month; thaw overnight in the refrigerator before serving. Add whipped cream only to slices you plan to serve immediately — it weeps if left on the pie overnight. The pie can also be frozen (without whipped cream) for up to 1 month; thaw overnight in the refrigerator before serving.
Make Ahead
The pie can be made up to 2 days in advance and stored covered in the refrigerator. The crust improves slightly after sitting overnight. Add the whipped cream topping within an hour of serving.
Frequently Asked Questions
Can I make this ahead of time?
Yes. Key Lime Pie is designed to be made ahead because the filling needs time to cool and set. Bake and chill the pie, then add the whipped-cream topping close to serving.
How do I store the leftovers?
Store covered in the refrigerator for up to 4 days. Add whipped cream only to slices you plan to serve immediately — it weeps if left on the pie overnight. The pie can also be frozen (without whipped cream) for up to 1 month; thaw overnight in the refrigerator before serving.
Can I freeze it?
Yes. Freeze the fully chilled pie without the whipped-cream topping, wrapped tightly. Thaw it in the refrigerator, then add freshly whipped cream before serving.
What substitutions work in Key Lime Pie?
Tested swaps for this recipe: fresh key lime juice: bottled Nellie & Joe's Key West Lime Juice. Use when fresh key limes aren't available or when you're short on time. The flavor is slightly less fresh but still distinctly key lime. graham cracker crumbs: digestive biscuits or vanilla wafer crumbs. Digestive biscuits make a slightly less sweet, more buttery crust. Vanilla wafers make it sweeter — adjust sugar down by half.
What's the most common mistake to avoid?
If you can find fresh key limes, use them — the flavor is brighter and more floral than bottled juice. But Nellie & Joe's Famous Key West Lime Juice is a genuinely good bottled option and I have used it without shame at multiple family gatherings.
