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Key Lime Pie (an American favourite, loved by all)

Published 25/04/2015, updated 25/07/2019 14 Comments

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key lime pie

key lime pie

When I’m asked for an easy pie or tart recipe, the Key Lime Pie is always the one I suggest, for the simple reason that there’s no pastry making, the base is like that of a cheesecake, made with biscuit crumbs. The filling is easy, really, three or four ingredients, doesn’t get easier than that, does it?

An American invention but loved by all, the story goes that the Key Lime Pie was invented in the late 19th century in Florida, by the cook of Key West’s first millionaire, William Curry. It’s made of ingredients that were available at that time – the local limes known as key limes (citrus aurantifolia), eggs and amazingly, condensed milk, a product found in Florida by the mid 19th century.

The availability of condensed milk is probably the making of the Key Lime Pie, bearing in mind that fresh milk wasn’t found easily and there was no viable mode of cold storage transportation at hand.

Key Lime Pie

mini key lime pie

The filling for the Key Lime pie bears a slight resemblance to that of Tarte au Citron. The difference is that while the Lemon Tart uses cream, eggs and lemon juice, the Key Lime pie, as mentioned above, uses condensed milk instead of cream and lime juice instead of lemon.

The Key Limes have a characteristic of their own, being slightly tarter than their Persian counterparts and bordering just on this side of bitter. They are also know as Mexican limes, Bartender’s limes and West Indian Limes.

key lime pie

biscuit crumbs

You get a beautiful kitchen chemical reaction when you make the Key Lime Pie. As you add the lime juice to the egg and condensed milk “custard”, a reaction called “souring” takes place, whereby the citric acid from the lime juice “cooks” the custard mix, thickening it in the process. In fact many early key lime pie recipes stopped at this stage, the pie was considered done.

Traditional Key West Key Lime Pie is served with a meringue topping; when you think about it, this is probably to use up the leftover egg whites! However, I much prefer the simple, sharp taste of the lime being able to shine through, perhaps complimented with a slight dollop of cream or a spoon of ice cream but my preferred method is most definitely as it comes!

key lime pie

key lime pie

Ginger biscuits for the base is perfect because the spicy, citrusy tones of ginger complements the tartness of the limes extremely well. Here, I’ve used basic dark ginger biscuits, as well as the “posher” ones with stem ginger which lend a slightly different texture to the whole pie. I also tend to add a tablespoon of demerara sugar for added bite/crunch, but not always, when I’m in the mood for it! Our biscuits are usually homemade but needless to say, shop bought are perfectly fine.

Our recipe substitutes a little of the condensed milk with evaporated milk, just enough to make it a gorgeous creamy dessert without being too sickly.

For more dessert recipes, head on over to the Desserts page for favourites like:

tarte au citron
Tarte au Citron (lemon tart)
Baileys Tiramisu
Baileys Tiramisu
Custard Tart
Custard Tart
Affogato Italian Coffee and Gelato Dessert
Affogato Italian Coffee and Gelato Dessert
Lemon and Passionfruit Tart
Lemon and Passionfruit Tart

Print
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Key Lime Pie

Key Lime Pie


★★★★★

5 from 8 reviews

  • Prep Time: 15 minutes
  • Cook Time: 25 minutes
  • Total Time: 40 minutes
  • Yield: Serves 8 1x
Print Recipe
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Description

Key lime pie recipe, an American invention but loved by all. Soft, creamy and tangy filling in a biscuit base.


Scale

Ingredients

Base

  • 250g (9 oz) ginger cookies (see above)
  • 100g (3.5 oz) melted butter
  • 1 Tbsp demerara (optional – see above)

Filling

  • 5 egg yolks
  • 200ml (4/5 cup) lime juice (about 6 limes)
  • 250ml (1 cup) condensed milk
  • 50ml (1/5 cup) evaporated milk
  • You will need a 9″/22cm loose base tart tin

Instructions

  1. Preheat the oven to 180˚C/350˚F and grease the tart tin.
  2. In a food processor, blitz the biscuits until they resemble coarse bread crumbs.
  3. If you have a feeding tube, add the butter as you continue running the food processor, otherwise, just add the butter and blitz again to mix thoroughly.
  4. Add the demerara sugar, if using, mix throroughly.
  5. Take this crumb mix and press into the tart tin, following the slanted edges and packing everything in.
  6. Bake in the oven for 10 minutes then take it out and let cool slightly while you make the filling. When you take it out, while it’s still hot and pliable, use a teaspoon or rounded knife to push/ease the pastry back to shape if it needs it. I like to push the base edges back to give the filling more room.
  7. Using a hand whisk, beat the egg yolks for about a minute, add both types of milk and whisk until blended. Go easy as you don’t want too many bubbles.
  8. Add the lime juice gradually as you continue to whisk gently. You’ll notice an immediate change in texture as the custard thickens and gives off a sour smell. Don’t worry, it’s supposed to.
  9. Gently pour into the prepared crust and bake for 15 to minutes. When done, the filling should have a slight wobble, if you’re not sure, leave it in for only a minute or two more, no longer, as it will start to rise and crack, you don’t want to go that far.
  10. Let cool, then refrigerate for at least 6 hours or overnight as I like to do.
  11. Take it out and rest at room temperature for about 15 minutes before serving for the best texture, this will give the butter-filled base a chance to relax. Serve with some whipped cream or a scoop of ice cream.
  • Category: Dessert
  • Cuisine: American

Did you make this recipe?

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Comments

  1. Fred Nonterah says

    17/06/2017 at 7:35 am

    I’m a big cheesecake fan and I’m sure I would love this as well and one big reason is the crust. I’ve heard a lot about key lime pie but I’ve never eaten or tried top make it.

    Reply
    • Azlin Bloor says

      17/06/2017 at 11:38 pm

      Key Lime pie is the first one I teach my students as I think it’s an easy one, as there’s no actual pastry!

      Reply
  2. Janice says

    11/06/2016 at 7:14 pm

    The best ever. My favorite. I re.em er .y firstly pie as my husband d me it several yrs ago. He added touch of Grand Mariner to the crust. Was very good!

    Reply
    • Azlin Bloor says

      11/06/2016 at 9:06 pm

      Isn’t it? I bet that Grand Marnier was awesome in the crust with the citrus flavour!

      Reply
  3. Rashida Shaikh says

    18/06/2013 at 11:21 am

    Hello,
    What a lovely pie!
    I could not control to bump here to see the secret ingredients.
    Your pie is Muaaammh. 🙂

    Have a nice week ahead!

    Reply
  4. Carole says

    22/04/2013 at 11:59 pm

    This key lime pie is just fab. Please drop me a line on [email protected] if it is ok with you if I link to it on my blog, Carole’s Chatter. Cheers

    Reply
  5. Coffee and Crumpets says

    22/04/2013 at 3:25 pm

    Did you disable your comment form? I can’t find it on your new posts to comment.

    Nazneen

    Reply
  6. mjskit says

    17/04/2013 at 3:35 am

    Oh how we love key lime pie! Yours looks perfect. I love the the ginger cookie crust! Unique and I’m sure quite delicious!

    Reply
  7. Choc Chip Uru says

    15/04/2013 at 8:09 pm

    Your pie looks magnificent 🙂
    Bookmarked!

    Cheers
    Choc Chip Uru

    Reply
  8. Azlina Khan says

    15/04/2013 at 10:04 am

    Just bookmarked this recipe. Will give it a try. Thanks Lin!!

    Reply
  9. David Crichton says

    15/04/2013 at 7:33 am

    My favourite pie. I love the way you have shown three different ways of presenting it. Think i’ll have mine in a glass!

    Reply
  10. vanessalillian says

    15/04/2013 at 6:47 am

    Goodness, I had no idea how easy it was to make! It’s another one of those American dishes I’ve never tried, along with red velvet cake and pumpkin pie. I have, however, made Grasshopper Pie, which was about as easy as this looks. Yum 🙂

    Reply
  11. Jagoda says

    14/04/2013 at 6:31 pm

    Wow! Can I please have a piece? 🙂 I never made Key Lime Pie, now I have to try it!

    Reply
  12. Elly says

    14/04/2013 at 3:48 pm

    I want to try it. So easy. Bookmarked your recipe Azlin.

    Reply

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LinsFood | by Azlin Bloor

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