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Easy Authentic Key Lime Pie Recipe

Authentic key lime pie with sweetened condensed milk and a graham cracker crust is a super easy recipe.

The Key West recipe combines sweet and tart flavors into a delicious and satisfying dessert.

The Best Key Lime Pie Recipe

A slice of pie on a plate next to the entire pie.

I’ve lived in Florida for almost 20 years now and first learned about the pie when I moved here. I had eaten lemon meringue pie, but never key lime.

The key lime adds a different flavor to the pie and a bit more tartness, and there are quite a few ways to make authentic key lime pie recipes, as well.

Some people like to add sour cream to the pie, which I will always eat, but I like to make the simpler version, which is what I am sharing today.

As always, the pie is made with sweetened condensed milk, which makes everything delicious!

Using Juice or Squeezing Key Limes

For this pie, you can use key lime juice from a jar, which is what I chose to do, or squeeze fresh key limes.

Squeezing the key limes will taste fresher, and you can add some key lime zest, but I also like the simplest of recipes and having the juice already squeezed and ready to go works great for me.

This pie recipe is a bit of a softer tart-tasting pie, so you can always add more juice if you’d like–and adding some zest will help add more tart flavor, as well.

My kids love tart foods that they can feel in their jawbones, right underneath their teeth–you know what I’m talking about.

A bite of key lime pie on a fork

Sweetened Condensed Milk Desserts

The recipe calls for a special ingredient and I’m not sure there are too many things in this world better than sweetened condensed milk because it’s truly heaven in a can–thick, creamy, sweet, and perfect.

As I’ve said before, I will risk cutting my tongue to lick the can. Every time. It’s so worth it.

The condensed milk has been around for over 150 years and is an ingredient in hundreds of recipes throughout the world, such as lemon meringue pie, chocolate pie, brownies, cookies, and much more.

A slice of key lime pie on a plate with whipped topping.

What Do I Need to Make Key Lime Pie?

(Full recipe and printable instructions listed at the bottom of the post)

  • Egg yolks
  • Sweetened condensed milk
  • Lime juice
  • Graham cracker crust
  • Key lime zest (optional)
  • Whipped topping (optional)
  • Meringue topping (optional)

Other desserts with sweetened condensed milk

Key lime pie on a plate with slices of lime

How Do I Make the Key Lime Pie with Sweetened Condensed Milk?

  1. Start by adding the egg yolks to a medium-sized bowl and mix for a couple of minutes (you will be cooking the pie for a few minutes in a later step).
  2. Next, add the sweetened condensed milk to the bowl and mix the two ingredients together.
  3. Add the lime juice to the pie, mix well, and pour the key lime filling into the graham cracker pie shell.
  4. Finally, bake the whole pie for 15 minutes and allow it to cool in the refrigerator for at least two hours.

Step-By-Step Instructions

Egg yolks in a glass bowl for key lime pie

Firstly, add the egg yolks to a medium-sized bowl and mix with an electric mixer or stand mixer for about three minutes to get them fluffy.

I didn’t make meringue for the top of the pie for this recipe, but you can certainly do that. If you decide to make meringue, save the egg whites from the recipe and you can use those to make meringue.

Pouring sweetened condensed milk into a glass bowl with egg yolks

Secondly, pour the sweetened condensed milk into the bowl with the egg yolks.

Mixing sweetened condensed milk and eggs.

Mix the two ingredients together on medium to high speed until well blended.

Pouring lime juice into a glass bowl with sweetened condensed milk

Thirdly, pour the lime juice into the bowl and mix it together.

This is real key lime juice, but from a jar.

Some grocery stores may not have key limes available, so you can either get the juice or use regular limes.

Key lime pie in a pie container with whipped topping.

Finally, pour the key lime pie mixture into the graham cracker crust and bake for 15 minutes at 350-degrees.

If you are going to add meringue on top, add it just before you place the pie into the oven and bake until the stiff peaks are golden brown, along with the rest of the top.

I used a pre-made 9-inch graham cracker pie crust for this recipe that I bought at the store to save time.

If you want to make a homemade graham cracker crust for the recipe, you will need the following ingredients:

  • 1-1/2 cups ground graham cracker crumbs
  • 1/3 cup white sugar
  • 6 Tablespoons melted butter

You can use the food processor to grind the graham cracker crumbs, and then add the sugar and butter.

Press the mixture into a 9-inch greased pie pan.

A piece of key lime pie on a plate with a fork

Once the pie cooks, remove it from the oven and place it in the refrigerator for at least two hours to set up.

Top with whipped topping for a creamy and tart dessert, or make some meringue to go on top.

What do I do with leftover key lime pie?

You can cover the pie with plastic wrap or place in an airtight container and keep in the refrigerator.

More favorite pie recipes:

  • Coconut cream pie – the recipe is made with heavy cream, toasted coconut, sugar, and more for a super delicious and creamy pie.
  • Maple pecan pie – this is your traditional pecan pie, but without corn syrup. The maple syrup gives it a wonderfully deep and delicious taste.
  • Chocolate cream pie – you can’t ever go wrong with chocolate. The recipe is made with five ingredients and you can make your own graham cracker crust with this pie, as well.
  • Cream pie from the Preppy Kitchen is out of this world scrumptious. The recipe combines custard and whipped cream for a wonderfully delicious recipe.

Classic Key Lime Pie Recipe

Check out the key lime pie with sweetened condensed milk recipe card below, grab those simple ingredients, and start cooking.

Then, share your comments below and share a picture on the Pinterest Pin!  If you made any changes or added something different, be sure to share it with us!

A slice of key lime pie in a plate with limes.

Key Lime Pie with Sweetened Condensed Milk

Yield: 8 slices
Prep Time: 15 minutes
Cook Time: 15 minutes
Additional Time: 2 hours
Total Time: 2 hours 30 minutes

Key lime pie with sweetened condensed milk is a super easy recipe and combines sweet and tart flavors into a delicious and satisfying dessert. 


  • 3 egg yolks
  • 1 - 14 ounce can sweetened condensed milk
  • 2/3 cup key lime juice
  • 1 teaspoon key lime zest (optional)
  • Whipped topping (optional)
  • 9 inch pre-made graham cracker crust


  1. Preheat oven to 350-degrees.
  2. Beat the egg yolks in a medium bowl for about 3 minutes to get fluffy.
  3. Combine egg yolks with sweetened condensed milk and mix well.
  4. Add the key lime juice and mix well.
  5. Next, add the key lime zest (optional) and mix well.
  6. Pour into the pie crust and bake for 15 minutes.
  7. Remove from the oven and refrigerate for at least two hours to set up.
Nutrition Information:
Yield: 8 Serving Size: 1
Amount Per Serving: Calories: 358Total Fat: 13gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 92mgSodium: 196mgCarbohydrates: 53gFiber: 1gSugar: 41gProtein: 8g

Nutrition is approximate.

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest

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