Keto Key Lime Pie with Creamy Filling and Almond Crust

This post contains affiliate links. As an Amazon Associate, we earn from qualifying purchases. This means we may earn a small commission if you purchase through our links, at no extra cost to you.

If you’re craving a bright, tangy dessert that screams summer, this keto key lime pie is exactly what you need. The creamy filling balances tart key lime juice with smooth cream cheese and a buttery almond flour crust. It’s refreshing, indulgent, and completely low-carb.

I first made this recipe for a Fourth of July barbecue, and it disappeared faster than any dessert I’ve ever brought. The citrus flavor cuts through the richness beautifully. Plus, it chills overnight, so you can prep it ahead and enjoy your party stress-free.

Whether you’re hosting a summer gathering or just want a zesty treat after dinner, this pie delivers. The texture is silky, the crust is perfectly crisp, and every bite tastes like sunshine. Let’s dive in and make this showstopper together.

Why You’ll Love This Recipe

Your New Favorite Citrus Dessert

Keto Key Lime Pie

Recipe by Charles

Course: DessertCuisine: AmericanDifficulty: Easy

Servings

Adjust servings

+

–

8

servings

Prep time

20

minutes

Cooking time

12

minutes

Calories

320

kcal

This keto key lime pie features a tangy cream cheese filling nestled in a buttery almond flour crust. It’s refreshing, creamy, and only 4g net carbs per slice. Perfect for summer gatherings or any time you crave a bright citrus dessert.

Ingredients

• 2 cups almond flour

• 0.25 cup butter

• 3 tablespoons powdered erythritol

• 16 ounces cream cheese

• 0.5 cup powdered erythritol

• 0.5 cup fresh lime juice

• 2 tablespoons lime zest

• 1 cup heavy cream

• 1 teaspoon vanilla extract

• 0.25 teaspoon sea salt

• 2 tablespoons lime slices

• 1 tablespoon fresh mint leaves

Directions

• Preheat your oven to 350°F and grease a 9-inch pie pan with butter or coconut oil.
• Mix the almond flour, melted butter, and 3 tablespoons powdered erythritol in a medium bowl until the mixture resembles wet sand.
• Press the crust mixture firmly into the bottom and up the sides of the prepared pie pan, using the bottom of a measuring cup to pack it down evenly.
• Bake the crust for 12 minutes until the edges turn golden brown, then remove and let it cool completely on a wire rack.
• Beat the softened cream cheese and 0.5 cup powdered erythritol in a large bowl with an electric mixer on medium speed until light and fluffy, about 3 minutes.
• Add the lime juice, lime zest, vanilla extract, and sea salt to the cream cheese mixture and beat until smooth and well combined.

Notes

• Make sure cream cheese is fully softened to room temperature to avoid lumps in the filling.
• Fresh lime juice is essential for the best flavor. Bottled juice doesn’t have the same brightness.
• The pie can be made up to 2 days ahead and stored covered in the refrigerator.
• For cleaner slices, dip your knife in hot water and wipe it clean between cuts.
• If you prefer a sweeter pie, taste the filling before chilling and add more sweetener to your liking.

Nutrition Facts

• Serving Size: 1 g
• Total number of serves: 8
• Calories: 320kcal
• Fat: 30g
• Carbohydrates: 9g
• Fiber: 5g
• Protein: 6g

Like this recipe?

Follow @easyketodessert on Pinterest

Tips for the Perfect Keto Key Lime Pie

Making this pie is straightforward, but a few tricks will take it from good to absolutely incredible. First, let’s talk about getting that crust just right. Then we’ll cover filling texture and flavor balance.

Getting the Crust Golden and Crispy

Press the almond flour mixture firmly into the bottom and up the sides of your pie pan. Use the bottom of a measuring cup to pack it down evenly. This prevents crumbling when you slice later. Bake until the edges turn golden brown, about 12 minutes. If you want more crust inspiration, check out this versatile keto pie crust guide for different techniques.

Choosing the Right Limes

Real key limes are smaller and more aromatic than regular Persian limes. However, they can be hard to find outside Florida. Regular limes work perfectly fine and still deliver that signature tartness. You’ll need about 6-8 key limes or 3-4 regular limes for half a cup of juice. Always use fresh juice, never bottled. The flavor difference is massive.

Achieving Silky Smooth Filling

Make sure your cream cheese is fully softened before mixing. Cold cream cheese creates lumps that won’t blend out. Leave it on the counter for at least an hour. Beat it with the sweetener first until fluffy, then add the lime juice and zest gradually. For the best results, I always use this electric hand mixer to get everything perfectly smooth.

Sweetener Selection Matters

Powdered sweetener dissolves better than granular in no-bake fillings. I prefer erythritol-based blends because they don’t have a cooling aftertaste like pure erythritol. Allulose also works beautifully if you can find it. Start with the amount listed, then taste before chilling. You can always add more sweetness, but you can’t take it away. If you’re curious about sweetener science, this artificial sweeteners overview breaks down the options.

Chilling Time Is Non-Negotiable

This pie needs at least 4 hours in the fridge to set properly. Overnight is even better. The filling firms up as it chills, making it sliceable instead of runny. Don’t skip this step or try to rush it in the freezer. Patience pays off with clean, beautiful slices.

Delicious Variations to Try

Once you master the basic recipe, you can customize it in so many fun ways. These variations keep the same low-carb structure while adding new flavors and textures. Let’s explore some of my favorites.

Coconut Crust Swap

Replace half the almond flour with unsweetened shredded coconut for a tropical twist. The coconut adds texture and pairs beautifully with lime. Toast the coconut first for deeper flavor. This works especially well if you’re making the pie for someone who loves piña colada vibes.

Dairy-Free Version

Swap the cream cheese for dairy-free cream cheese and use coconut cream instead of heavy cream. Make sure to chill a can of full-fat coconut milk overnight, then scoop out only the thick cream on top. The texture stays rich and creamy without any dairy. This variation is perfect for guests with lactose intolerance.

Whipped Cream Topping

Add a layer of sugar-free whipped cream on top before serving. Whip cold heavy cream with a tablespoon of powdered sweetener and a splash of vanilla extract. Spread it over the chilled pie or pipe it decoratively around the edges. It adds extra richness and looks gorgeous for special occasions.

Lemon Lime Hybrid

Use half lime juice and half lemon juice for a mellower citrus flavor. This works great if you find pure lime too tart. The lemon softens the punch while keeping that bright, sunny taste. Add a bit of lemon zest too for extra aroma.

Mini Pie Portions

Press the crust into muffin tins lined with parchment paper instead of one large pie pan. Fill each cup with the lime mixture and chill. These individual servings are perfect for portion control and look adorable at parties. Plus, they’re easier to serve without worrying about perfect slices. If you love citrus desserts, you might also enjoy this keto key lime cheesecake variation for a denser texture.

Graham Cracker Style Crust

Add a teaspoon of cinnamon and a tablespoon of extra sweetener to the crust mixture. This mimics the flavor of traditional graham cracker crusts. It’s a nostalgic touch that makes the pie taste even more like the classic version. My family loves this twist during the holidays.

Nutrition Breakdown You’ll Feel Good About

Each slice of this keto key lime pie contains approximately 320 calories, which is reasonable for a rich, satisfying dessert. The macros break down to about 30g of fat, 6g of protein, and only 4g net carbs. That’s low enough to fit into most keto meal plans without any guilt.

The fat comes primarily from cream cheese, butter, and almond flour. These are healthy fats that keep you satisfied and support ketosis. The protein content is modest but helpful. Most importantly, the net carbs stay low thanks to the sugar-free sweetener and the naturally low-carb lime juice.

Compared to traditional key lime pie, which can have 40-50g of carbs per slice, this version is a game-changer. You get all the flavor without the blood sugar spike. The fiber from almond flour helps too, supporting digestion while keeping net carbs down. If you’re following a ketogenic eating plan, this dessert fits perfectly into your daily targets.

The portion size is generous at one-eighth of the pie. You can cut smaller slices if you want to reduce calories further, but honestly, a full slice is so satisfying that you won’t feel deprived. The combination of fat and tang makes each bite feel indulgent. For ingredient accuracy, I recommend using a digital kitchen scale to measure everything precisely.

If you’re watching calories closely, you can lighten the filling slightly by using half cream cheese and half Greek yogurt. This drops the fat content a bit while adding extra protein. The texture changes slightly but stays creamy and delicious. Just make sure to use full-fat Greek yogurt to maintain richness.

Overall, this pie proves you don’t have to sacrifice flavor to stay keto. It’s rich, tangy, and completely satisfying. Whether you’re new to low-carb baking or a seasoned pro, this recipe delivers consistent results. Similar to our popular keto pumpkin pie, this dessert works beautifully for holidays and everyday treats alike.

Your Questions Answered

Here are the most common questions readers ask about making keto key lime pie. These answers will help you troubleshoot any issues and customize the recipe to your preferences.