Recipe

Classic Key Lime Pie

Creamy, tangy key lime pie with a crisp graham cracker crust, baked just long enough to set, then chilled for clean slices.

By Matt Campbell

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4.8

A chilled slice of key lime pie with a pale yellow filling, graham cracker crust, and a small swirl of whipped cream on top, photographed on a bright kitchen table

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Key lime pie is one of those desserts that feels like a magic trick: you whisk a few everyday ingredients, pour them into a crunchy crust, and somehow end up with a slice that is creamy, bright, and just sweet enough to make the tang pop.

This is my go-to, no-drama version. It has a sturdy graham cracker crust (crisp edges, always), a filling that sets without getting rubbery, and enough lime flavor to make you pause mid-bite and go, okay wow. You can use true Key limes if you have them, but regular Persian limes work beautifully too.

Key lime pie ingredients on a clean kitchen counter including graham crackers, butter, sweetened condensed milk, limes, eggs, and a mixing bowl

Why It Works

Big lime flavor, balanced sweetness: Sweetened condensed milk brings the creamy sweetness, while fresh lime juice keeps it sharp and bright.
Custardy texture without fuss: Egg yolks plus a short bake gives you that classic set filling that still melts on the tongue.
A crust that stays crisp: Prebaking the graham crust helps it hold up under the filling and slice clean after chilling.
Make-ahead friendly: This pie actually improves after a long chill, which is my favorite kind of dessert planning.

Pairs Well With

Storage Tips

How to Store Key Lime Pie

Refrigerator: Cover the pie (or individual slices) and refrigerate up to 4 days. I like to press plastic wrap gently against any cut surfaces to prevent drying.
Freezer: Freeze slices on a sheet pan until firm, then wrap tightly and store in a freezer bag up to 2 months. Thaw overnight in the fridge for the best texture.
Whipped cream note: If you are topping with whipped cream, add it right before serving for the cleanest look.

Individual slices of key lime pie on small plates covered and stored on a refrigerator shelf

Common Questions

Can I make this with regular limes instead of Key limes?

Absolutely. Key limes are a little more floral and aromatic, but Persian limes (the standard grocery store kind) still give you a fantastic pie. If you want to mimic that Key lime vibe, add 1 teaspoon finely grated lime zest to the filling for a boost.

Do I have to bake key lime pie?

This classic style is baked briefly to set the yolks and stabilize the filling. It is a quick bake, not a long custard situation. You can find no-bake versions, but they set differently and usually rely on extra whipped topping or gelatin.

How do I know the filling is done baking?

The pie is done when the edges look set and the center has a gentle jiggle, like Jell-O that is still deciding who it wants to be. It will firm up as it cools and chills.

Why did my filling turn runny?

The usual culprits are: not enough chilling time, underbaking (too jiggly), or using bottled lime juice that can be less acidic. Fresh juice helps the filling set properly and taste brighter.

Can I use a store-bought crust?

Yes. A 9-inch store-bought graham cracker crust works. You can still give it a quick 5 minute bake to help it stay crisp, but it is optional.

Can I make it ahead for a party?

Yes, and you should. Make it the day before, chill overnight, then garnish right before serving. Cleaner slices, better flavor, less stress.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

9-inch pie dish
Food processor or zip-top bag and rolling pin (for crumbs)
Mixing bowls
Whisk
Microplane or fine grater (optional, for zest)
Citrus juicer
Measuring cups and spoons
Cooling rack

The first time I made key lime pie on my own, I expected it to be complicated. Like, pastry-chef complicated. Then I realized it is basically a very well-behaved whisk-and-pour situation, and the real challenge is waiting long enough for it to chill before you “just taste a sliver” three times in a row. Now it is my go-to dessert when I want something that feels special but still lets me keep the kitchen vibe relaxed. Crisp crust, bright filling, whipped cream on top, and everyone suddenly remembers they have room for dessert.