Easy Key Lime Pie Recipe with Creamy Citrus Filling

This easy key lime pie recipe makes one 9-inch pie with about 8 slices using a prepared graham-cracker crust, sweetened condensed milk, egg yolks, and key lime juice. The filling takes only about 10 to 15 minutes to prepare, bakes for 15 minutes at 350°F (175°C), and needs at least 3 hours to cool and chill before serving.

Every slice has a buttery, crisp crust and a smooth, creamy citrus filling that tastes bright, sweet, and pleasantly tart. Finish it with whipped cream and a little lime zest for a classic dessert that looks special but requires very little effort.

Why You’ll Love This Recipe

This is the kind of dessert that delivers a restaurant-style finish without a long ingredient list or complicated pastry work. The prepared graham-cracker crust keeps the process quick, while the condensed milk creates a naturally rich, creamy filling.

The flavor is wonderfully balanced. Sweetened condensed milk softens the sharp citrus bite, and key lime juice brings the unmistakable tang that makes every forkful taste refreshing rather than heavy.

It is also an excellent make-ahead dessert. Since the pie needs several hours to chill, you can prepare it in the morning for dinner or make it the day before a gathering.

If you enjoy bright citrus desserts, you may also like these easy lime bars, which offer the same lively flavor in a hand-held square.

Ingredients You’ll Need

The ingredient list is short, but each component plays an important role in the finished pie. Measure the lime juice accurately so the filling has the intended balance of sweetness and tartness.

• Prepared graham-cracker crust: Use one 9-inch crust for the simplest preparation and a dependable crunchy base.
• Sweetened condensed milk: One 14-ounce can provides sweetness and a thick, creamy texture.
• Egg yolks: Three large yolks help the filling set into a tender custard as it bakes.
• Key lime juice: Use 1/2 cup of bottled or freshly squeezed juice. Bottled key lime juice is often the easiest option because fresh key limes produce limited juice.
• Key-lime zest: One teaspoon is optional, but it adds a fragrant citrus note and attractive specks throughout the filling.
• Whipped cream: This is optional for serving, but its light texture pairs beautifully with the tart pie.

If you are using fresh key limes, zest them before cutting and juicing them. The zesting step is much easier while the fruit is still firm and whole.

For a completely different type of sweet treat after dinner, keep our cake batter fudge recipe nearby for bite-sized pieces.

How to Make It Step-by-Step

Step 1: Heat the oven to 350°F (175°C). Place the prepared 9-inch graham-cracker crust on a baking sheet, which makes it easier to move and helps catch any crumbs or small spills.

Step 2: Add the three egg yolks and the 14-ounce can of sweetened condensed milk to a medium bowl. Whisk until smooth, taking care to break up any streaks of yolk so the filling has an even color and texture.

Step 3: Pour in the 1/2 cup of key lime juice and add 1 teaspoon of finely grated zest, if using. Whisk just until combined, then let the mixture stand for a few minutes; it will thicken slightly as the citrus works with the condensed milk.

Step 4: Pour the filling into the graham-cracker crust. If you see a few bubbles on the surface, gently tap the baking sheet on the counter once or twice, but avoid rough handling that could crack the crust.

Step 5: Bake for about 15 minutes at 350°F (175°C). The outer edges should look set, while the center should still have a slight, gentle quiver when the pie is carefully moved.

Step 6: Transfer the pie to a cooling rack and let it cool to room temperature. This gradual cooling helps the custard finish setting before refrigeration.

Step 7: Refrigerate the pie for at least 3 hours before slicing. Overnight chilling is preferable when your schedule allows because it gives the filling plenty of time to firm up.

Step 8: Slice the pie while chilled and top each portion with whipped cream. Add a touch of lime zest just before serving for a fresh aroma and pretty finish.

Pro Tips for the Best Key Lime Pie

The most important tip is to watch the pie closely during baking. A key lime pie should not look completely firm in the center when it leaves the oven; a slight jiggle is a good sign because the filling continues to set as it cools.

Resist the temptation to bake it longer simply because the middle moves. Overbaking can make the custard firm, dry, or slightly curdled instead of smooth and creamy.

Bottled key lime juice is a sensible choice for this recipe, not a shortcut to avoid. Fresh key limes are small, and collecting a full 1/2 cup can take many fruits and considerable squeezing.

For the freshest flavor, grate the zest from clean limes before juicing them. Use the fine side of a zester and remove only the colored outer layer, avoiding the bitter white pith beneath it.

Whisk the filling until combined, but there is no need to beat it aggressively. Excessive whisking can introduce air bubbles that may show on the surface after baking.

For a savory dinner before dessert, try these black bean burgers with cilantro-lime sauce. The fresh lime notes make a pleasing connection between the meal and the pie.

Serving Suggestions

Serve every slice cold, straight from the refrigerator. The cool temperature keeps the custard firm enough to cut cleanly and makes the tart flavor especially refreshing.

A spoonful of whipped cream adds a soft, airy contrast to the dense filling. You can pipe it around the edge, place a small dollop on each slice, or serve it in a bowl for guests to add themselves.

A little additional lime zest is all the decoration this pie needs. For an attractive presentation, sprinkle it lightly over the whipped cream instead of covering the entire surface.

This pie is a natural finish for a warm-weather meal, but its bright flavor also works beautifully for holidays, potlucks, birthdays, and family Sunday dinners. For another traditional dessert centerpiece, see this recipe for old-fashioned apple pie.

Storage and Make-Ahead Advice

Keep the baked pie refrigerated after it has cooled to room temperature. Cover it carefully to protect the surface from refrigerator odors and to keep the graham-cracker crust from drying out.

The pie needs at least 3 hours of chilling before slicing, but overnight chilling is preferable. That extra time gives the filling a fully set, sliceable texture and makes next-day entertaining especially easy.

Add whipped cream shortly before serving when possible. This keeps the topping looking fresh and prevents it from losing its shape during extended refrigeration.

For a meal-planning note, this dessert pairs well with simple make-ahead dishes. If you are building a casual menu, our air fryer meatballs can provide a hearty savory course before the citrus pie.

Easy Key Lime Pie Recipe

A creamy, tangy key lime pie made with sweetened condensed milk, egg yolks, and a simple graham-cracker crust. It is baked briefly, chilled until firm, and served cold with optional whipped cream.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 15 minutes mins

Total Time 3 minutes mins

Servings: 8 servings

Ingredients Method Notes

Ingredients

  

Pie Filling and Crust

• 1 crust Prepared 9-inch graham-cracker crust
• 14 ounces Sweetened condensed milk
• 3 egg yolks Large egg yolks
• 1/2 cup Key lime juice
• 1 teaspoon Finely grated key-lime zest

For Serving

• as needed Whipped cream

Method

 

Step-by-Step

1. Heat the oven to 350°F (175°C). Set the prepared 9-inch graham-cracker crust on a baking sheet so it is easy to transfer in and out of the oven.
2. Whisk the three egg yolks and sweetened condensed milk in a mixing bowl until the mixture is smooth and evenly combined. Mix in the key lime juice and finely grated zest, then let the filling stand for a few minutes so it thickens slightly.
3. Pour the filling into the graham-cracker crust and gently smooth the top. Bake for about 15 minutes, until the edges are set while the center still has a slight jiggle.
4. Remove the pie from the oven and cool it to room temperature. Refrigerate for at least 3 hours, or overnight when possible, before slicing.
5. Serve the pie chilled with whipped cream and a little additional lime zest, if desired. Cut with a clean knife for neat slices.

Notes

Do not overbake the pie. Bottled key lime juice is a practical choice because fresh key limes are small and can be difficult to juice in sufficient quantity. Zest the limes before juicing them.

Final Thoughts

This easy key lime pie recipe proves that an impressive dessert does not require a complicated crust or a long list of ingredients. With one prepared graham-cracker crust, a can of sweetened condensed milk, three egg yolks, and bright key lime juice, you can create a smooth and memorable pie in just a few simple steps.

Keep the bake short, look for set edges and a gently quivering center, and give the pie plenty of time to chill. Serve it cold with whipped cream and lime zest, then enjoy the creamy, sweet-tart slice that makes key lime pie a lasting favorite.