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Key Lime Pie is the tart, creamy, sweet slice of sunshine that tastes like a Florida vacation in dessert form, and this classic version comes together with just a handful of ingredients. I make it every summer when the kids want something cool and citrusy, and it disappears in record time. If you want a smaller, fuss-free version, our mini no-bake key lime pie is the perfect single-serving cousin.
That signature balance of tangy lime and sweet condensed milk over a buttery graham crust is impossible to resist.
Key Lime Pie Quick Look
- 🕒 Prep Time: 15 minutes
- 🌡️ Cook Time: 20 minutes
- ⏳ Total Time: 35 minutes plus chilling
- 🍽️ Serving: 8 servings
- ⚡ Calories: 269kcal
- 🌶️ Flavor Profile: Tart, creamy, sweet, and citrusy on a buttery graham crust
- ✋ Difficulty: Easy, about as simple as our mini cheesecakes
Quick Answer
Press a buttery graham cracker crust into a pie dish and bake it briefly so it holds together. Whisk together egg yolks, sweetened condensed milk, and key lime juice until smooth and slightly thickened, pour it into the cooled crust, and bake just until the center is barely set with a slight jiggle. Chill the pie completely for at least a few hours, then top it with freshly whipped cream and serve it cold for that perfect sweet-tart bite.
Jump to:
Why This Recipe Works
Click to see the technique science
- Sweetened condensed milk does the magic. It reacts with the acidic lime juice to thicken the filling into that signature silky, sliceable texture, no gelatin needed.
- Key lime juice brings the tang. Its bright, slightly floral tartness is what sets a real key lime pie apart from a plain custard.
- The graham crust adds buttery crunch. A quick bake sets it so it holds together and gives the perfect contrast to the creamy filling.
- Egg yolks enrich it. They add richness and help the filling set up firm and smooth.
- It is a make-ahead dream. The pie needs to chill, so it is the perfect dessert to make the day before a party.
- It is simple and quick. About 15 minutes of hands-on work and a short bake stand between you and a classic pie.
Why You’ll Love This Recipe
- It hits that perfect sweet-tart balance that makes key lime pie a forever favorite.
- It is made with just a handful of pantry ingredients and comes together fast.
- It is a make-ahead, crowd-pleasing dessert, right alongside our lemon lime angel food cupcakes.
Key Ingredients
A short, simple ingredient list is what makes this pie a classic. Each one pulls its weight for that signature flavor and texture.
- Graham Crackers: crushed into crumbs for the buttery, crunchy crust; they also star in our no-bake key lime eclair cake.
- Butter: binds the crumbs and bakes into a golden, sturdy crust.
- Key Lime Juice: the tart, floral star; bottled key lime juice works great when fresh keys are hard to find.
- Sweetened Condensed Milk: sweetens and thickens the filling into that silky, sliceable texture.
- Egg Yolks: add richness and help the filling set up firm and smooth.
See recipe card for exact quantities.
Variations and Substitutions
This classic is easy to adapt to your taste or the occasion.
- Make it no-bake: try our frozen mini no-bake key lime pies for a quick version.
- Swap the crust: a vanilla wafer or shortbread crust is delicious too.
- Use regular limes: Persian lime juice works in a pinch, though it is a touch less floral.
- Top it differently: meringue or a lime-zest whipped cream both look gorgeous.
- Go tropical: pair it with our no-bake coconut cream pie on a summer dessert table.
How to Make Key Lime Pie
- Preheat the oven to 350 degrees Fahrenheit.
- Mix the graham cracker crumbs with melted butter and press firmly into a 9-inch pie dish.
- Bake the crust for about 10 minutes until lightly golden, then set aside to cool.
- Whisk the egg yolks until smooth, then beat in the sweetened condensed milk.
- Add the key lime juice and whisk until the filling is smooth and slightly thickened.
- Pour the filling into the crust and bake for about 15 minutes, just until set.
- Cool, then chill completely before topping with whipped cream and slicing.
Recipe Tips & Tricks
- Use bottled key lime juice if fresh key limes are hard to find; it is authentic and consistent.
- Do not overbake the filling; it should still have a slight jiggle in the center when you pull it out.
- Chill at least 3 hours, or overnight, so the pie slices cleanly.
- Zest a lime over the top for a pop of color and extra citrus aroma.
- Wipe your knife between slices for clean, bakery-style pieces.
- Make it ahead; it holds beautifully overnight, just like our mini cheesecakes.
Serving Ideas and Suggestions
Key lime pie is best served cold, straight from the fridge, with a generous swirl of whipped cream and a little lime zest on top. The cool, tangy filling makes it the perfect bright finish to a summer cookout, a backyard barbecue, or a seafood dinner, and the make-ahead nature means you can have dessert handled long before guests arrive.
For a dessert spread, serve it next to our layered lemon blueberry trifle and a batch of lemon lime angel food cupcakes for a citrus-themed table everyone will love.
When the weather is hot, pair a slice with our frozen mini no-bake key lime pies or cool oatmeal cream pie ice cream bars for the ultimate make-ahead dessert duo.
Key Lime Pie FAQs
Classic key lime pie has a graham cracker crust filled with a mixture of egg yolks, sweetened condensed milk, and key lime juice. It is usually topped with whipped cream or meringue.
Key limes are smaller, more tart, and more aromatic than common Persian limes. Their distinctive floral tartness is what gives key lime pie its signature flavor.
Yes. Bottled key lime juice is a convenient and reliable substitute for fresh, and many bakers use it year-round with excellent results.
The filling sets through the reaction between the acidic lime juice and the sweetened condensed milk, helped along by a short bake. If your pie stayed loose, the most common culprits are not using enough lime juice, swapping in a low-acid substitute, underbaking, or slicing before it has chilled all the way through. Use the full amount of juice, bake just until the center barely jiggles, and give it several hours in the fridge to firm up.
Covered in the refrigerator, key lime pie keeps for up to 4 days. For the best texture and cleanest slices, keep it well chilled until right before serving, and add the whipped cream topping fresh rather than days ahead so it stays light and fluffy.
Yes, key lime pie freezes beautifully. Freeze it without the whipped cream, wrapped tightly in plastic and foil, for up to a month. Thaw it overnight in the fridge and add fresh whipped cream before serving, or enjoy it semi-frozen straight from the freezer for a refreshing summer treat.
Craving more citrus desserts? Our no-bake key lime eclair cake delivers the same tangy flavor with zero oven time.
Love an easy no-bake slice? Our creamy no bake peanut butter pie is a must-make.
Key Lime Pie
Ingredients
- 1 sleeve honey graham crackers
- 1/2 stick unsalted butter melted
- 4 egg yolks
- 1 egg white
- 1/2 Cup key lime juice
- 14 oz sweetened condensed milk
Instructions
- Pre heat oven to 350 degrees.
- Pulverize graham crackers in a food processor, drizzle in butter. Press into pie pan and bake for 5 minutes. Take out of oven and let cool on counter.
- Make the filling while the crust is cooling. Separate eggs, saving one egg white in a separate bowl. Whisk the egg yolks and add in the condensed milk and key lime juice.
- Using a whisk or hand mixer, whisk the egg white to stiff peaks.
- Fold in the lime mixture with the egg white until fully incorporated. Pour into pie crust.
- Bake for 15-20 minutes until the pie is slightly jiggly when you take it out of the oven. Place in the fridge and let set up for a minimum of 6 hours. Top with whipped cream or whipped topping.
- Serve and enjoy!
Nutrition
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Yes it is safe, unless they have allergy issues with any of the ingredients. There is nothing raw in the mix. Thanks for asking!