Keto Key Lime Pie Recipe

5 from 220 votes

Impress your friends and family with this creamy, sugar-free, low-carb keto key lime pie. This delectable dessert is perfect for any occasion and pairs wonderfully with tea or coffee.

Looking for more pie recipes? Try my easy keto cheesecake, delicious low-carb custard tart, or, for a savory option, this keto quiche Lorraine.

A slice of key lime pie on a white plate with a fork.
This keto key lime pie is a low-carb and sugar-free treat that everybody will love.

Why This Recipe Stands Out

Our sugar-free sweetened condensed milk is the secret to this delicious keto dessert, making it a rich and flavorful treat without the added carbs. This recipe yields 16 servings, each containing only 3g net carbs.

Ingredients for Keto Key Lime Pie Success

For the Almond Flour Crust:

  • 7 ounces almond meal
  • 1/4 cup golden flaxseed meal
  • 1 tablespoon swerve sweetener (erythritol and monk fruit also work)
  • 3 ounces melted unsalted butter

For the Creamy Filling:

  • 4 eggs
  • 14 ounces sugar-free sweetened condensed milk
  • 1/2 cup heavy cream
  • 1/2 cup key lime juice (Note: I could not source key limes for this recipe so we used regular limes from the grocery store which turned out perfectly)
  • Zest of 3 limes

For the Light Topping:

  • 7 fluid ounces of heavy cream. I have a Keto whipped cream recipe that you can print it has so many uses.

How To Make The Perfect Keto Key Lime Pie

For steps of making keto key lime pie.
How to make keto key lime pie.

Step 1: Preparing the Crust

  1. Preheat your oven to 340°F (170°C).
  2. Combine almond meal, flaxseed meal, and Swerve sweetener in a bowl.
  3. Mix in the melted butter until well combined.
  4. Press the mixture into a 9-inch springform pan, ensuring it covers the base and reaches at least 1 inch up the sides.
  5. Bake the crust for 12 minutes or until golden brown and firm. Set aside to cool.

Step 2: Creating the Luscious Filling

  1. Reduce the oven temperature to 300°F (150°C).
  2. Whisk together the eggs and sugar-free sweetened condensed milk using a hand mixer.
  3. Slowly pour in the lime juice, heavy cream, and lime zest while mixing on low speed.
  4. Pour the filling into the cooled crust and bake for 35-40 minutes, or until the center has a slight wobble.
  5. Let the pie rest at room temperature for 20 minutes before refrigerating for at least 2 hours.

Step 3: Adding the Finishing Touch

  1. Whip the heavy cream until soft peaks form.
  2. Spread the whipped cream over the cooled pie.
  3. Slice into 16 pieces and enjoy!

Expert Tips and Storage

  • For a richer flavor, use freshly squeezed key lime juice.
  • Experiment with other low-carb sweeteners like monk fruit or erythritol (monk fruit is my favorite).
  • If you prefer a dairy-free option, try using coconut milk instead of heavy cream.
  • Store your keto key lime pie in the refrigerator for up to one week.
  • The pie (without the whipped cream topping) can be frozen for up to three months. Thaw overnight in the refrigerator before serving.

Frequently Asked Questions

Can I use a different type of flour for the key lime pie crust?

While almond flour and flaxseed meal work best for this recipe, you can experiment with other keto-friendly flours like coconut flour or a combination of almond flour and psyllium husk.

Can I freeze sugar-free key lime pie?

Absolutely! You can freeze either the entire pie or individual slices. After freezing, wrap the pie or slices in cling film and then aluminum foil. The pie can be stored in the freezer for up to 3 months. Thaw it in the refrigerator overnight or on the counter before serving.

Can I make this key lime pie dairy-free?

While this specific recipe hasn’t been tested as dairy-free, you can experiment with dairy-free alternatives. Consider replacing butter in the crust with coconut oil, whipped cream with whipped coconut cream, and cream cheese with a dairy-free cream cheese made from coconut or almonds. This would be for experienced cooks only.

Can I use lemons instead of limes in key lime pie?

Yes, you can substitute lime juice for lemon juice in this recipe. If needed, adjust the amount of sweetener to balance the lemons’ tartness.

Can I make key lime pie without eggs?

This recipe relies on eggs for the filling’s structure and texture. We haven’t tested an egg-free version, but you could try using a chia seed or flaxseed as an egg substitute.

Watch Key Lime Pie Being Made

Keto Key Lime Pie Recipe - The BEST Low-Carb Sugar Free Version Around (Delicious)
Key lime pie being made.
A slice of keto key lime pie on a white plate.

Keto Key Lime Pie

Impress your friends and family with this creamy, sugar-free, low-carb keto key lime pie. This delectable dessert is perfect for any occasion and pairs wonderfully with tea or coffee.

Rate it

5 from 220 votes
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Course: Dessert
Cuisine: American
Prep Time: 15 minutes
Cook Time: 1 hour
Total Time: 1 hour 15 minutes
Servings: 16 serves
Calories: 325kcal
Author: Gerri

Unit Conversion



  • 7 ounces Almond Meal
  • 1/4 cup Golden Flax Meal
  • 1 tablespoon Swerve
  • 3 ounces Butter melted



  • 7 fluid ounces Heavy Cream



  • Preheat fan forced oven to 170C/340F.
  • Combine almond meal, flax meal and Swerve and mix well.
    7 ounces Almond Meal, 1/4 cup Golden Flax Meal, 1 tablespoon Swerve
  • Add the melted butter and mix well.
    3 ounces Butter
  • Pour mixture into the base of a 9in spring form pan and press into the base and at least 1in up the sides.
  • Bake the crust for 12 minutes, or until golden and firm. Set aside to cool.


  • Reduce the oven temperature to 150C/300F.
  • Whisk together the eggs and sugar free sweetened condensed milk in a stand mixer on medium speed.
    4 Eggs, 14 ounces Sugar-free sweetened condensed milk
  • Drop the speed to low and slowly pour in the lime juice, and then the cream and the lime zest.
    1/2 cup Heavy Cream, 1/2 cup Key Lime Juice, 3 Limes
  • Pour the mixture into the cooled base and bake in the oven for 35-40 minutes, until there is only a slight wobble in the center.
  • Leave the pie at room temperature for 20 minutes to rest before placing in the fridge for at least 2 hours to cool.
  • Slice into 16 pieces and enjoy. We recommend serving it with a dollop of softly whipped cream.


  • Whip cream and spread over the top of the cooled pie.
    7 fluid ounces Heavy Cream
  • Slice into 16 pieces and enjoy.


Keto Key Lime Pie Recipe – The BEST Low-Carb Sugar Free Version Around (Delicious)


STORING: Store key lime pie in the fridge for up to 1 week, the pie without the whipped cream topping can be frozen for up to 3 months and defrosted overnight in the fridge.


Serving: 100g | Calories: 325kcal | Carbohydrates: 5g | Protein: 4g | Fat: 32g | Saturated Fat: 16g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Cholesterol: 86mg | Sodium: 21mg | Potassium: 48mg | Fiber: 2g | Sugar: 1g | Vitamin A: 450IU | Vitamin C: 3.3mg | Calcium: 40mg | Iron: 0.7mg
Made this recipe?Tag me at @myketokitchen

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Matt Dobson

I am the founder of My Keto Kitchen. I am a nutritionist, cooking enthusiast, and part-time Van Lifer! Along with a qualified chef, we have created a collection of delicious and healthy recipes.

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20 thoughts on “Keto Key Lime Pie Recipe”

  1. BEST KEY LIME PIE EVER! I have to admit, though that after making the sweetened condensed milk recipe I could have just stopped and eaten the whole 14 oz with a spoon- it’s THAT delicious!!

  2. My pie had AMAZING flavor but it wasn’t all too creamy. It had. Gritty texture to it. I did make the condensed milk with powdered swerve…that’s the only difference i made :/

    • Hi Beth,

      It could be the powdered swerve that caused it, I have only ever made the condensed milk with granulated sweetener. I would suggest sticking with granulated sweetener for the sweetened condensed milk for next time 🙂

  3. hi! i am planning on making this tomorrow but my local stores didn’t have almond meal or flax meal – so i just bought almond flour. would the crust work with almond flour? if so should i adjust the ingredient amounts? thanks soooo much

    • Hi Drew,

      I don’t recommend making the crust on almond flour alone as it needs the flax meal to help it come together. You could try using the recipe for the crust in our Quiche Lorraine recipe, but leave out the salt and pepper, and add 1 tbsp of sweetener.

      I hope that helps.

  4. This might be a stupid question- but when it calls for 7 ounces of Almond meal- is that like 7 fluid ounces (as in I should measure in a measure cup) or 7 ounces in weight?

    Thank you!!

    • Hi HA,

      There is no alternative to the sugar-free condensed milk, there are no packaged versions that we are aware of.

      • Lol sorry, I should have clicked the link above. I just made a batch of the sugar-free condensed milk (amazing!) and the key lime pie. It’s just out of the oven, and I am so impressed by the results. This recipe will be my go-to dessert from now on!

  5. I’ve made this recipe 4 times. It was great everytime. I use a different low carb sweetened condensed milk recipe each time and it gives it a different feel, but this is the base recipe I make and everyone loves it.

5 from 220 votes (220 ratings without comment)

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