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Key Lime Pie

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3.75 from 4 votes

This key lime pie is tart, sweet, creamy and easy to make! Only four ingredients in the key lime filling and three ingredients for the graham cracker crust.

Key Lime Pie slices on a blue and white dish towel

Are you recovering from Game of Thrones as you read this?

The series finale was last night, and while I don’t care about that show in the least, I’m obviously in the very small minority. I know what it feels like to be so invested in a show that you’re literally on the edge of your seat and you kind of forget to breathe, so I can relate.

Plus, the GoT episodes are long and it’s on late (on the East coast, anyway) so I know people will totally have a Game of Thrones hangover today.

But like I said… for me, the show ending is the equivalent of the shrug emoji. Just not a fan.

Key Lime Pie with a lime and zester

Semi-related, I have a confession to make: I don’t like key lime pie. I really don’t. I love basically anything else lime-flavored, but key lime pie is a no-go for me.

I’ve never been able to pinpoint exactly what it is that I don’t care for, and I’ve tried all sorts of various kinds served in restaurants, made by friends… I just can’t get on board.

So, with that confession out of the way, I want to clarify that as someone who won’t eat it herself, I’ve had a ton of different taste testers over the years and this is the recipe that people rave about.

I’ve made mini key lime pies for Friendsgiving celebrations, I’ve made key lime pie bars for work parties, and I’ve made it in its original key lime pie form (like you’ll see in this post). Every time it’s been a hit.

Key Lime Pie

I once made the pie for a Fourth of July party where there was going to be ten people, so I sliced them into sixteen smaller slices (since it’s usually eight slices). I showed up and put it in the fridge, walked away for about fifteen minutes to say hi to everyone, and by the time I came back to the kitchen to help setup there was one sliver left.

Like… how. Does not compute.

Key Lime Pie slices on a blue and white dish towel

What’s the difference between limes and key limes, anyway?

So, I’ve always wondered what the crap the difference is between limes and key limes. I did a little research and here’s what I learned:

  • The limes you usually see in grocery stores are actually persian limes, and actually turn yellow when they’re fully ripe, but they’re only sold when they’re still green.
  • Key limes are slightly more yellow in color, and used to be more prevalent in the United States before the 1920s when a hurricane wiped out many of the groves. 
  • Key limes are smaller, tarter, and their juice is more aromatic and intense.
  • And the zest of a key lime has more… well, zest, than a persian lime. 

Key limes are harder to find in stores, but don’t despair! Most stores sell bottled key lime juice, so if you can’t get your hands on key limes you can still make key lime pie. 

Key Lime Pie

Now – let’s make some pie, shall we?

Making the graham cracker crust

The crust is super easy if you have a food processor, and still easy if you don’t.

  1. Either pulse your graham crackers in a food processor or crush them in a large resealable bag with a rolling pin, and then pour them into a large bowl.
  2. Add melted butter and granulated sugar, and stir to combine.
  3. Press the mixture into a 9″ pie pan and bake it for 8-9 minutes.

That’s it!

Step by step photos of making a graham cracker crust

Making the key lime pie filling

Making the filling is also all sorts of easy.

  1. You’ll combine egg yolks, sweetened condensed milk, lime juice and lime zest in a large bowl.
  2. Either use a hand mixer on low speed to combine, or just whisk it by hand until it’s all combined.
  3. Pour it into your prepared crust. 

The end.

Step by step photos of making key lime pie filling

Once everything is ready to go, you’ll throw it back in the oven until the filling is mostly set and the center is just a little bit jiggly (for me it’s always 20 minutes). 

Let it cool on a wire rack and then store it in the fridge until you’re ready to decorate it!

Key Lime Pie

I love making my mascarpone whipped cream (shocker) to pipe around the border, and then add thin, quartered lime slices. People have commented that having a less-sweet whipped cream on top creates a really nice balance between the sweet and tart pie.

And if you’ve never had my mascarpone whipped cream, it’s my favorite thing and I want to put it on absolutely everything. It’s less sweet than your typical canned whipped cream, and it’s stabilized so it won’t fall apart on you once you’ve piped it (but it’s not stiff like buttercream).

So once your pie has cooled, you could decorate it with the whipped cream ahead of time to save yourself a few minutes before serving.

Key Lime Pie

I’m also a big fan of a big dollop of whipped cream with a cute little twist of lime right in the center. Then I add some fresh lime zest all over the top, and we’re all set.

It makes a pretty presentation, don’t you think?

Key Lime Pie slices on a blue and white dish towel

Does anyone else feel like they’re really bad at cutting pie? I am consistently terrible at it. The cuts are never straight, I lose part of the crust along the way, and they always just look… weird.

Case in point:

Key Lime Pie slice on a blue and white dish towel

I really don’t know why this is so difficult for me. If you have some pie-cutting magic, please share it with me so I can stop being so bad at this.

Regardless, you can slice it into 8 slices, or – if you’re better and slicing pan than me – you can manage to get 16 thinner slices out of it. 

Or you can just slice it in half, lift one side onto a plate and hand the pie plate with the other half to your significant other and call it a day. I’m not here to judge.

Up close shot of a key lime pie slice

I recommend using a 9″ pan, because it gives you a decently thick crust and filling with some height.

We’re not talking Cheesecake Factory towering heights or anything, but it’s respectable.

Key Lime Pie slices on a blue and white dish towel

While I may never partake in a slice of key lime pie with you, I’m here to cheer you on while you make and eat as much as your little heart desires.

Sharing is caring, so invite a friend over to help you demolish the pan.

Key Lime Pie slices on a blue and white dish towel

I’m including the above picture because I think that piece of pie looks like a little lime-eared bunny and it makes me laugh.


Key Lime Pie slices on a blue and white dish towel

Key lime flavor doesn’t have to end with pie:

After you’ve made this recipe, please consider coming back to share your experience with others by leaving a comment below with a star rating!

Key Lime Pie

Key Lime Pie

3.75 from 4 votes
This key lime pie is tart, sweet, creamy and easy to make! Only four ingredients in the key lime filling and three ingredients for the graham cracker crust.
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 1 hour 35 minutes
Servings 8 slices


Graham Cracker Crust:

  • 1 ½ cups graham crackers, ground in crumbs (about 12 sheets)
  • cup granulated sugar
  • 6 tablespoons unsalted butter, melted

Key Lime Filling:

  • 4 egg yolks
  • 2 14 ounce cans full-fat sweetened condensed milk
  • 1 cup key lime juice, fresh squeezed or bottled
  • Zest of 2 limes, about 2 tablespoons

Toppings (optional, but encouraged):



  • Preheat oven to 350°F.
  • In a food processor, pulse graham crackers until they form small crumbs.
  • In a medium bowl, combine graham cracker crumbs, sugar and melted butter and stir until combined.
  • Press mixture into the bottom and up the sides of a 9" pie dish. Bake for 8-9 minutes, or until the edges are golden. Set aside, and leave the oven on - you'll need it soon!


  • In a large bowl, used a hand mixer on low speed to combine egg yolks, sweetened condensed milk, lime juice and lime zest. You can also whisk by hand if desired.
  • Once combined, pour into your prepared crust.
  • Bake for 20 minutes, or until the top is set to the touch and appears just a little bit jiggly in the center if you wiggle the pan.
  • Let cool for at least 30 minutes on a wire rack, preferably until completely cooled. Cover with plastic wrap and chill in the fridge until ready to serve, or for at least for 1 hour.
  • Top with whipped cream and lime slices, slice and serve. Enjoy!


Calories: 216kcal | Carbohydrates: 24g | Protein: 3g | Fat: 13g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 120mg | Sodium: 118mg | Potassium: 79mg | Fiber: 1g | Sugar: 13g | Vitamin A: 408IU | Vitamin C: 9mg | Calcium: 32mg | Iron: 1mg
Course Dessert
Cuisine American
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