This classic, easy, Key Lime Pie recipe is a refreshing treat! Start with a simple homemade graham cracker crust, fill it with a 3-ingredient key lime filling, and top everything off with a sweet, fluffy whipped cream.
This is a simple, refreshing, and timeless dessert. I taste-tested so many variations before settling on this final recipe, and it’s definitely a keeper! I hope you love it as much as my family does! Be sure to check out the video at the bottom of the recipe for step-by-step instructions.
I get this obnoxious notion in my head once a recipe’s been on my site for too long that I didn’t do it proper justice the first time around. For example, I originally shared this Key Lime Pie recipe over 3 years ago as a gift for my Dad on Father’s Day. I vividly remember laboring over the recipe until I was finally happy with it, and I distinctly recall that it was well-received and promptly devoured.
But when I decided I wanted to make a video and breathe new life into an old recipe, I was sure that my original recipe could be improved on. I mean, haven’t I learned so much in the past 3+ years? Surely I could make a better pie, right? And so I tried.
I tried variation after variation, playing with vanilla extract additions, renditions made with sour cream instead of egg yolks, visa versa, and combinations of the two. Cream was added, condensed milk was added in a number of different measurements, and I kept a chart of everything different about each version of the recipe.
And then, I made my dad (and at least 5 other members of my immediate family, but it’s my Dad’s favorite dessert so he’s the authority) come over and blind taste-test each one and give me their verdict, voting for which was the ultimate, best.
And the winner was….
The very same recipe I originally shared over 3 years ago. Yup.
If I had any faith in myself I could have spared my local grocery store well over a gallon of condensed milk and myself hours of time, but here we are back at the beginning and I’m happy to (re-)share the verified best Key Lime Pie recipe with you.
So, What Makes a Good Key Lime Pie?
This was tough, and everyone has different tastebuds, but my taste-testers and I agreed that the BEST version would be one that was:
- Definitively tart, without making your mouth totally pucker — you need to be able to eat the whole slice and some pies are so tart I can’t make it past one or two bites!
- Sweet, but in a way that complemented the tartness without overwhelming it.
- Simple to make; why change a good simple classic by complicating it with fancy ingredients or techniques!?
- No frills, no surprise twist, just a comfortingly predictable and classic, crumbly graham cracker crust, a creamy filling with a tart lime bite, and a fluffy, thick, sweet homemade whipped cream topping.
Check, check, check, and check.
Classic Ingredients
In addition to the staple graham cracker crust and the (not-so) optional whipped cream, a classic Key Lime Pie has just three ingredients:
- Sweetened condensed milk
- Egg yolks
- Key lime juice
After a lot of experimentation (ahem, see above), I definitely believe that keeping it simple with just these three ingredients is best. I tried versions with vanilla extract (it just detracts from the pure key lime flavor of the pie, don’t do it!) and sour cream (not bad, just simply not as good, it works great in my cheesecake recipe but not here), but in the end, the classic won.
Can I use Regular Limes?
No. Key limes aren’t just smaller and more obnoxious to squeeze than regular limes, they also have a different acidity and flavor to them. While some people will argue that you can substitute an equal amount of lime juice for key lime juice, I cannot recommend it myself (at least not without further testing, and I’m currently all test-ed out).
I am OK, however, with using bottled key lime juice if you are unable to find fresh key limes in your supermarket. It’s very difficult for me to find fresh key limes where I live and when I do find them they’re usually of questionable quality, so I’ve used the bottled version with success many times — do make sure it’s bottled key lime juice, though!
How to Store
This pie will keep in the refrigerator for up to three days, just cover it with plastic wrap or aluminum foil. If you’d like to freeze your pie, wrap it tightly and completely and it will keep for up to a month in the freezer.
If using whipped cream topping, do not add this before freezing your pie.
Enjoy!
More Recipes You Might Like:
Recipe video at the bottom of the post! If you enjoy watching my cooking videos, I’d love it if you would consider subscribing to my YouTube channel <3
Key Lime Pie
Ingredients
Crust
- 1 ½ cups (170 g) graham cracker crumbs
- 2 Tablespoons granulated sugar
- 1 Tablespoon light brown sugar sugar
- 6 Tablespoons (85 g) butter melted
Filling
- 2 cups (475 ml) sweetened condensed milk¹
- 6 large egg yolks
- ⅔ cups (160 ml) key lime juice²
Whipped Cream
- ¾ cup (180 g) heavy whipping cream
- ¼ cup (30 g) powdered sugar
- ½ teaspoon vanilla extract
Instructions
- Preheat oven to 350F (175C).
Graham Cracker Crust
- In a medium-sized bowl, stir together graham cracker crumbs and sugars. Stir in melted butter until well-combined.1 ½ cups (170 g) graham cracker crumbs, 2 Tablespoons granulated sugar, 1 Tablespoon light brown sugar sugar, 6 Tablespoons (85 g) butter
- Press crumb mixture into bottom and up the sides of a 9.5" pie pan.
- Set pie crust in the refrigerator to chill while you prepare the filling.
Filling
- In a large bowl, whisk together condensed milk and egg yolks until well combined.2 cups (475 ml) sweetened condensed milk¹, 6 large egg yolks
- Stir in key lime juice and whisk until slightly thickened (about 2 minutes).⅔ cups (160 ml) key lime juice²
- Pour into pie crust and bake on 350F (175C) for 18 minutes.
- Remove from oven and allow to cool completely before transferring to refrigerator.
- Chill overnight or at least 6 hours.
Homemade Whipped Cream Topping³
- Before serving pie, combine heavy cream, powdered sugar and vanilla in a bowl. Use an electric mixer to beat until stiff peaks are achieved (the mixture should have a thick, light, "Cool-Whip" like consistency).¾ cup (180 g) heavy whipping cream, ¼ cup (30 g) powdered sugar, ½ teaspoon vanilla extract
- Pipe or spread over chilled pie. Slice and serve.
Notes
Storing and Freezing
This pie will keep up to 3 days in the refrigerator, cover with plastic wrap or foil. If freezing, do not add whipped cream until you are ready to serve. To freeze, wrap tightly and thoroughly with plastic wrap and store in the freezer for up to one month. If thawing the whole pie, return to the refrigerator several hours before serving and allow it to thaw in the refrigerator, if thawing a single slice allow it to thaw in the refrigerator for 45-60 minutes before enjoying.Nutrition
Nutritional information is based on third-party calculations and should be considered an estimate only. Actual nutritional content will vary based upon brands used, measuring methods, cooking method, portion sizes, and more.
Since I originally shared this recipe for my dad on Father’s Day, I’m leaving in this photo from the original post — here’s my dad making an embarrassing reference at my wedding.
Recipe originally published 06/22/2015, photos and text updated 08/29/2018. Not the recipe, though, that was evidently just right as written and remains the same, albeit with a few additional (hopefully helpful) notes.
Emily
Delicious! I’m thinking about using a mini muffin pan to make bite-sized key lime pies. Do you have any suggestions for how I may need to alter the baking time or anything else for that matter? Thank you in advance!
Sam
Hi Emily! They are going to be really, really small. I think you will end up with too much crust to pie ratio. If you wanted to make them smaller, I would probably recommend using a jumbo muffin tin or even mason jar lids. I haven’t tried this myself so I don’t know about baking times. I hope this helps. 🙂
Emily
Sam, I accidentally used 2 full cans and only 6 tablespoons of butter. Is it doomed?
Sam
Hi Emily! It may be a little liquidy and may not set right. 🙁
Robert
Hi Sam – mine just came out of the oven. I’ll let you know what everyone thinks of it tomorrow!
Judy
The video made it so simple! We had it for our (small) Christmas dinner, and my husband said, let’s freeze the other half for NY Eve. So I was able to wow twice on one pie. The crust was crumbly—I would have to work on that—but it tasted great. Thanks!
Sam
I am so glad you enjoyed it, Judy! I am also impressed it made it through 2 meals. So tough for me to do I can’t stop eating it. 😂
Carmen
I love Key Lime Pie. This showed up on FB this morning. I will definately try it. I cannot get it to print though. UGH
Sam
I am so glad you enjoyed it, Carmen! 🙂
Patricia
Made it for the first time. Delicious my new favorite.
Sam
I’m so happy to hear you enjoyed the key lime pie, Patricia! 🙂
Margie
Thanks, Sam, for this delicious recipe! I had never made Key Lime Pie and always thought it was difficult, but as you encouraged us, it wasn’t. Thanks for your step-by-step instructions… and the video was helpful as well. Made two the night before Thanksgiving and everyone raved. My neighbor just asked for the recipe! Thanks again 🙂
Sam
I am so glad you enjoyed the pies. Thank you for the kind feedback. ☺️
Annalisa
Keeps for three days? You’re kidding, right? 😉
Sam
😂 More like 3 hours right?
Elayne
Yessssss!!!! You have answered my prayers!!! I am going to make this this weekend!!!
Sam
I hope you LOVE it, Elayne!!
Chella
You looked so adorable on your wedding day Sam. Your dad looked wonderful and confident too. He deserves this honor of a Key Lime Pie on Father’s day!
Sam
🙂 Thank you Chella!!
Frankie Lawson
II came across your site this morning and I will be trying your Key Lime Pie this weekend.
I’m a 72 year old cook who is still learning from you young bloggers, thank you for posting.
Sam
Let me know how you like it Frankie! 🙂
Shelby @ Go Eat and Repeat
Key Lime Pie is a great summer dessert! Love the fresh, slightly tartness of it!
Sam
Thanks Shelby!
Cathleen @ A Taste Of Madness
I seriously need to go out and buy some key limes!! This pie looks too good!
Sam
Do itttt. Thanks! 🙂
Harriet Emily
This looks so delicious! I adore Key Lime Pie! It’s such a summer classic. I love the wedding photo too, it’s so nice to hear how close you are to your Dad! 🙂
Sam
🙂 Thanks Harriet Emily 🙂
Ashley
I can’t even remember the last time I had key lime pie! I need to change that! This looks delicious! And I love that picture from your wedding reception 🙂
Sam
Thank you Ashley!!
Annie @ The Garlic Diaries
I loveeee some key lime pie. This looks amazing! I want a slice so bad right now!
Sam
Thanks Annie!! 🙂
Rachael @ Squat.Eat.Repeat
This looks great! I’ve been wanted to make a key lime pie for a while now. And leave it to dads to embarrass us! haha xx
Sam
You should definitely try it out, and let me know what you think! 😀
Samuel
First attempt! Turn out GREAT! Thanks for sharing!
Sam
I’m so happy to hear it was a success! Thanks for commenting, Samuel 🙂