Tropical Mango Key Lime Pie

Here is my favorite mango key lime pie recipe, with a creamy, tangy filling that combines sweet tropical mango with tart key lime juice, all nestled in a simple graham cracker crust.

This mango key lime pie is what I make when I want something refreshing after a heavy dinner. The kids love how the mango makes it a little sweeter than regular key lime pie, and it’s perfect for our warm Portland summers.

What Kind of Mango Should I Use?

For this pie, you can use either fresh or frozen mango, and both will give you great results. If you’re going with fresh mango, look for ones that give slightly when you press them – they should smell sweet and fragrant at the stem end. Popular varieties like Tommy Atkins, Kent, or Honey mangoes all work well, though Honey mangoes tend to be a bit sweeter if you can find them. Frozen mango is actually a convenient option since it’s already peeled and chopped, plus it’s available year-round when fresh mangoes might be out of season or expensive. Just make sure to thaw it completely and drain any excess liquid before pureeing to avoid making your pie filling too watery.

Options for Substitutions

This tropical pie is pretty forgiving when it comes to swaps, so here are some options if you’re missing ingredients:

• Graham cracker crumbs: You can crush up vanilla wafers, digestive biscuits, or even gingersnaps for the crust. Just pulse them in a food processor until you get fine crumbs.
• Coconut: If you’re not a coconut fan or don’t have any, you can skip it entirely or replace it with finely chopped toasted almonds or pecans for extra crunch.
• Mango puree: Fresh mango works great – just blend 1 ripe mango until smooth. You could also try peach or papaya puree for a different tropical twist.
• Fresh lime juice: Bottled lime juice works in a pinch, but fresh really makes a difference here. You could also use lemon juice, though you’ll lose some of that key lime flavor.
• Egg yolks: If you’re concerned about raw eggs, you can use pasteurized eggs or egg substitute (follow package directions for equivalent of 4 yolks).
• Whipping cream: Heavy cream works the same way. You can also use whipped topping from a container, but fold it in gently to keep the texture light.

Watch Out for These Mistakes While Baking

The biggest mistake when making key lime pie is not achieving the right consistency for your filling – if your lime juice isn’t fresh or acidic enough, the condensed milk won’t thicken properly, leaving you with a runny pie that won’t set.

Another common error is over-mixing the mango puree into the filling, which can create an uneven texture and prevent the pie from setting correctly – gently fold it in just until combined.

Make sure your graham cracker crust is completely cooled before adding the filling, and press it firmly into the pan with the bottom of a measuring cup to prevent it from crumbling when you slice the pie.

Finally, resist the urge to skip the chilling time – this pie needs at least 4 hours in the refrigerator to set properly, and overnight is even better for clean, perfect slices.

What to Serve With Mango Key Lime Pie?

This tropical pie is pretty rich and creamy, so it pairs beautifully with a simple cup of black coffee or some light herbal tea to balance out all that sweetness. I love serving it alongside fresh berries like strawberries or blueberries, which add a nice tartness that complements the mango and lime flavors. A dollop of lightly sweetened whipped cream on top is always a good idea, or you could even sprinkle some toasted coconut flakes for extra tropical vibes. Since it’s such a decadent dessert, I usually serve smaller slices and let the pie be the star of the show after a lighter meal.

Storage Instructions

Refrigerate: Your mango key lime pie needs to stay chilled in the refrigerator at all times. Cover it with plastic wrap or store it in an airtight container and it’ll keep fresh for up to 5 days. The flavors actually get better after a day or two as everything melds together nicely.

Freeze: This pie freezes really well for longer storage! Wrap individual slices in plastic wrap and then foil, or freeze the whole pie covered tightly for up to 3 months. It’s great to have on hand for unexpected guests or when you’re craving something tropical.

Serve: When serving from the fridge, let it sit out for about 10 minutes to make slicing easier. If you’re serving frozen pie, let it thaw in the refrigerator for a few hours or at room temperature for about 30 minutes. The texture will be perfectly creamy and ready to enjoy!

Preparation Time	20-30 minutes
Cooking Time	25 minutes
Total Time	480-510 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 2300-2500
• Protein: 30-36 g
• Fat: 120-135 g
• Carbohydrates: 260-290 g

Ingredients

For the crust:

• 1 cup crushed graham crackers (finely crushed for an even crust)
• 5 tbsp melted butter
• 1/3 cup shredded unsweetened coconut

For the filling:

• 1/2 cup mango puree (I use fresh, ripe mangoes for best flavor)
• 1/2 cup lime juice (freshly squeezed Key lime juice preferred)
• 4 egg yolks
• 1 can sweetened condensed milk (gives better texture and moisture)

For the topping:

• 1 cup heavy cream
• 1 tsp vanilla extract (I use Nielsen-Massey for rich flavor)

Step 1: Prepare and Bake the Graham Cracker Coconut Crust

• 1 cup crushed graham crackers
• 1/3 cup shredded unsweetened coconut
• 5 tbsp melted butter

Preheat your oven to 350°F (175°C).

In a pie pan, stir together 1 cup crushed graham crackers and 1/3 cup shredded unsweetened coconut.

Pour in 5 tablespoons of melted butter and mix with a fork until all the dry ingredients are evenly moistened.

Press the mixture firmly onto the bottom and up the sides of the pie pan to form a compact crust.

Bake the crust in the preheated oven for 10 minutes, then set aside to cool slightly.

Step 2: Prepare the Mango-Lime Filling

• 1/2 cup mango puree (fresh or frozen)
• 1/2 cup lime juice
• 1 can sweetened condensed milk
• 4 egg yolks

In a medium bowl, blend together 1/2 cup mango puree, 1/2 cup lime juice, 1 can sweetened condensed milk, and 4 egg yolks until completely smooth and homogenous.

I like to use a whisk to ensure there are no pockets of yolk or condensed milk—this helps the pie have a silky texture.

Step 3: Fill and Bake the Pie

• prepared graham cracker coconut crust from Step 1
• prepared mango-lime filling from Step 2

Pour the prepared mango-lime filling from Step 2 into the baked crust from Step 1, spreading it evenly.

Bake the pie at 350°F (175°C) for 15 minutes, until the edges are set but the center still has a slight jiggle.

Remove the pie from the oven and place it on a wire rack to cool to room temperature.

Step 4: Chill the Pie

Once the pie has cooled on the wire rack, transfer it to the refrigerator.

Let it chill for at least eight hours, or overnight, so the filling can completely set.

I always recommend waiting the full chilling time for neat, clean slices.

Step 5: Make the Whipped Cream Topping

• 1 cup heavy cream
• 1 tsp vanilla extract

Just before serving, whip 1 cup heavy cream with 1 teaspoon vanilla extract in a bowl until soft peaks form.

If you prefer, you can add icing sugar to taste for sweetness—I usually do, as it gives the cream a lovely finish.

Step 6: Serve the Pie

• whipped cream from Step 5

Slice the chilled pie and add a generous dollop of whipped cream from Step 5 to each slice.

Serve and enjoy!