Enjoy a refreshing keto key lime pie packed with the same tangy-sweet flavor of the classic dessert—without sugar or gluten. This low-carb treat is a smart choice for both your cravings and your metabolic health. It features a rich, buttery almond flour crust with a hint of cinnamon that recreates the taste of traditional graham crackers, paired with a silky-smooth, zesty filling.
You can prepare it as a no-bake keto dessert for a quick, summer-friendly option, or bake the crust for a crispier texture. Either way, it’s the perfect bright and refreshing treat for gatherings or anytime you want a guilt-free indulgence.
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Why I Love This Keto Key Lime Pie
• Perfectly Balanced Flavor Profile – Bright, tangy lime zest and fresh juice blend seamlessly with the rich, creamy filling to deliver that classic key lime flavor—without the sugar spike or crash.
• Authentic Texture & Indulgent Feel – A buttery almond flour crust recreates the satisfying crunch of traditional graham crackers, while the smooth, velvety filling sets perfectly—showing that healthier desserts can still feel indulgent.
• Low-Carb & Keto-Approved (Without the “Diet” Taste) – With fewer than 5g net carbs per slice, this keto key lime pie helps maintain ketosis while satisfying cravings—so delicious that even non-keto eaters won’t notice the difference.
• Crowd-Pleasing & Versatile Dessert – Ideal for everything from casual family meals to special celebrations, this pie impresses every time and proves you don’t have to sacrifice flavor to enjoy a health-conscious treat.
What You'll Learn From This Recipe
• Learn Core Keto Baking Techniques – Discover how to craft a realistic graham-style crust using almond flour and well-balanced low-carb sweeteners that won’t spike blood sugar.
• Make Your Own Keto Condensed Milk – Master an easy method for turning heavy cream into a smooth, sweet condensed milk alternative ideal for no-bake treats.
• Understand No-Bake Dessert Science – Get to know how gelatin functions as a setting agent and how to use it correctly for a firm yet creamy, sliceable texture.
• Enhance Flavor Without Sugar – Train your taste buds to build rich, layered flavors using natural ingredients like lime zest, vanilla, and cinnamon instead of relying on sugar.
• Convert Classic Desserts to Keto – Build practical skills in ingredient swaps and ratio adjustments so you can recreate your favorite high-carb desserts in a keto-friendly way.
Overview
Sugar free whipped cream is a low-carb, keto-friendly topping made by whipping heavy cream with zero-calorie or low-carb sweeteners like erythritol, monk fruit, or stevia. It contains little to no sugar, making it ideal for diabetics, keto dieters, and low-carb dessert recipes. Most versions use only 2–3 ingredients and take under 5 minutes to prepare.
Keto Graham Crust
- Preheat your oven to 325°F (165°C).
- In a dry skillet over medium heat, lightly toast the almond flour for 3–5 minutes, stirring constantly until it turns a soft golden color. This step boosts flavor and gives it a graham cracker–like taste. Let it cool completely.
- Transfer the toasted almond flour to a mixing bowl and combine with salt, cinnamon, and a blend of powdered monk fruit and allulose sweetener.
- Pour in the melted butter and mix until the texture becomes crumbly and well combined.
- Prepare a 9-inch deep-dish pie pan or a 10-inch tart pan with a removable base by lining the bottom with parchment paper and greasing the sides with butter.
- Firmly press the crust mixture into the base and along the sides of the pan, creating an even layer.
- Bake for 8–10 minutes, or until the edges turn lightly golden.
- Remove from the oven and allow the crust to cool completely before adding any filling.
Keto Key Lime Pie Filling
- Warm 2 tablespoons of lime juice in the microwave for about 20 seconds, just until slightly heated.
- In a separate bowl, sprinkle gelatin over 3 tablespoons of lime juice and allow it to bloom for 3–5 minutes. Microwave the mixture for another 20 seconds, then stir until fully dissolved and smooth.
- In a large mixing bowl, whip the heavy cream until soft peaks form. Gradually pour in the dissolved gelatin-lime mixture while mixing on medium speed, ensuring it blends evenly. Scrape down the sides of the bowl and set aside.
- Using another bowl, beat the cream cheese with a hand mixer until smooth and creamy.
- Add the prepared keto condensed milk and continue mixing on medium speed until fully incorporated.
- Gently fold the whipped cream mixture into the cream cheese mixture, then beat on medium speed for 1–2 minutes until the filling becomes thick and velvety.
- Add the vanilla and key lime juice gradually while mixing, then continue beating for another 1–2 minutes until well combined. If desired, mix in natural coloring.
- Taste the filling and adjust sweetness as needed.
- Pour the mixture over the cooled crust, spreading it evenly to the edges.
- Refrigerate for at least 6 hours or overnight to allow it to fully set.
For the Topping:
- Right before serving, whip ½ cup of heavy cream with a powdered sweetener until soft, airy peaks form. Pipe the whipped cream over the pie for a clean, decorative finish.
- For full coverage, start with 1 cup of heavy cream. Add ¼ cup powdered sweetener blended with 2 teaspoons of Instant Clear Jel to stabilize the texture. This helps the whipped cream hold its shape, resist melting in warm conditions, and stay fresh for several days when refrigerated.
- Finish with a vibrant garnish of fresh lime slices and a sprinkle of finely grated lime zest for added flavor and visual appeal.
Keto Key Lime Pie
Equipment
- 9-inch deep dish pie plate or 10 inch tart pan.
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- To see the ingredient amounts in metric units, click the blue "METRIC:" button between the ingredients and the instructions for this recipe.
Ingredients
For the Crust
- 2 cups almond flour
- 2 tbsp coconut flour
- ½ tsp salt
- 1 tbsp cinnamon
- ¼ cup powdered monk fruit with allulose(see notes)
- ⅓ cup melted butter or coconut oil
For the Keto Condensed milk
- 2 cups heavy cream
- ¼ cup unsalted butter
- ½ cup powdered allulose sweetener
- ½ tsp vanilla
- pinch of salt
Keto Key Lime Pie Filling
- 1 cup heavy whipping cream
- 1 tsp vanilla
- 10 ounces softened cream cheese
- 14 ounces keto condensed milk
- ⅔ cup key lime juice
- 1 pkg unflavored gelatin
Instructions
Make the Keto Condensed Milk the Night Before
- Pour 2 cups of heavy cream into a medium-sized saucepan and add 1/4 cup of unsalted butter.
- Bring the mixture to a gentle boil over medium heat, stirring constantly. Once boiling, stir in 1/2 cup powdered allulose sweetener and a pinch of salt if using.
- Reduce heat to low and simmer for 15-20 minutes, stirring occasionally, until the mixture thickens and reduces by about half. Watch that pot so it doesn't boil over.
- The condensed milk is ready when it coats the back of a spoon. Remove from heat and stir in vanilla extract if using. Allow to cool completely - it will continue to thicken as it cools.
- Transfer to a glass jar and refrigerate.
Make the Crust
- Preheat your oven to 325°F (165°C)
- .In a dry skillet over medium heat, toast the almond flour for 3-5 minutes until lightly golden, stirring frequently. This enhances the flavor and makes it taste more like graham crackers. Allow to cool.
- In a mixing bowl, combine the toasted almond flour, coconut flour, salt, cinnamon, and powdered sweetener.
- Add the melted butter and stir until the mixture resembles coarse crumbs.
- Line the bottom of an 9-inch deep dish pie or 10 inch tart pan with removable bottom with parchment paper and grease the sides with butter. Press the mixture firmly into the bottom and up the sides of the pan
- Bake for 8-10 minutes until lightly golden around the edges. Remove from oven and cool completely.
Make the Filling
- Remove 3 tbsp of the lime juice and add the geletin to the juice. Wait 3-5 minutes for the geletin to bloom and then heat in the microwave for 15 seconds or less until warm. Stir to make sure it is all dissolved.
- In a chilled bowl beat the heavy cream until soft peaks form and slowly add the lime juice with the gelatin dissolved in it. Refrigerate.
- Whip the cream cheese with a hand mixer or stand mixer until smooth. Add the sweetened condensed milk and mix on medium-low until smooth and incorporated. Scrape the bowl.
- Fold the stabilized whipped cream into the whipped cream cheese or mix it in with the mixer on the lowest speed.
- Slowly add the Key Lime Juice. Scrape the bowl and mix for 30 more seconds. The mixture should be creamy and smooth. Add a tiny bit of natural green food color mix until the color is incorporated evenly throughout. .
- Add the filling to the cooled graham cracker pie shell. Refrigerate for 2 hours.
Garnish with Keto Whipped Cream
- Serve with Keto whipped cream. To make Keto Whipped Cream, Whip 2/3 cup of heavy whipping cream until soft peaks form. Combine 1 tsp instant clear jel with 3 tbsp of powdered allulose sweetener. Add the mixture to the whipped cream, beating while adding the allulose with instant clear jel.
- Pipe rosettes onto the pie or cover the pie with whipped cream and garnish with lime slices and lime zest.
Video
Notes
Nutrition
FAQ
Is sugar free whipped cream really sugar free?
Is sugar free whipped cream keto-friendly?
What is the best sweetener for sugar free whipped cream?
Can diabetics eat sugar free whipped cream?
Why did my whipped cream turn into butter?
Final Thoughts
This keto key lime pie proves that you don’t have to give up your favorite desserts to stay on track with a low-carb lifestyle. With its bright citrus flavor, creamy texture, and perfectly balanced sweetness, it delivers everything you love about traditional key lime pie—without the sugar or gluten.
Whether you choose the no-bake version for convenience or bake the crust for added crunch, this recipe is both versatile and reliable. It’s ideal for summer gatherings, special occasions, or simply satisfying a craving while staying in ketosis. Plus, with under 5g net carbs per slice, you can enjoy every bite without guilt.
More than just a dessert, this recipe teaches valuable keto baking techniques—from making sugar-free condensed milk to achieving the perfect set with gelatin—giving you the confidence to recreate other classic treats in a healthier way.
In the end, this keto key lime pie isn’t just delicious—it’s proof that healthy eating can still feel indulgent, impressive, and completely satisfying.
