Introduction

This sugar free key lime pie offers a refreshing, tangy dessert without the extra calories. Made with a toasted almond flour crust and creamy key lime filling, it’s perfect for those seeking a bold, tart treat that’s light on sugar but big on flavor.

A round lime pie cut into eight slices sits on a white plate placed over a white marbled surface. The pie has three visible layers: a thick, crumbly brown crust forming a raised edge around the pie, a smooth creamy white filling layer in the middle, and dollops of white whipped cream on top near the crust. Each slice is decorated with two thin semicircular green lime slices placed on the whipped cream, and bright green lime zest is sprinkled lightly over the surface of the pie filling, adding a textured, fresh look. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

Graham Cracker Crust:
2 cups blanched almond flour
1 teaspoon cinnamon
½ cup zero calorie sweetener
¼ teaspoon salt
½ cup unsalted butter (1 stick), melted
Key Lime Pie Filling:
½ cup fresh key lime juice
6 oz cream cheese, softened
1 cup plain Greek yogurt (full fat preferred)
¾ cup zero calorie sweetener
1 ½ teaspoons unflavored gelatin
½ tablespoon key lime zest
Optional Garnishes:
Whipped cream
Lime zest
Lime slices

Instructions

Step 1: Place a skillet over medium-high heat and add the almond flour. Stir continuously for 2-4 minutes until the flour is golden and fragrant to toast it and enhance flavor.
Step 2: Transfer the toasted almond flour to a 9.5 inch pie plate. Add the cinnamon, sweetener, and salt. Mix to combine evenly.
Step 3: Gradually add the melted butter and stir until the mixture forms a crust. Press the crust firmly into the bottom of the pie plate to create an even base.
Step 4: Warm the key lime juice in the microwave for 30-45 seconds until warm but not hot. Stir in the unflavored gelatin until completely dissolved; this may take a few minutes.
Step 5: In a bowl or stand mixer, beat the softened cream cheese, sweetener, lime zest, and Greek yogurt together until smooth and creamy.
Step 6: Add the lime juice and gelatin mixture to the cream cheese blend. Mix thoroughly and taste. Adjust sweetness or lime zest if needed for your preferred balance.
Step 7: Pour the filling into the prepared crust, spreading evenly.
Step 8: Chill the pie for at least 2-3 hours until set. For best results, freeze for 1½ hours then let it sit at room temperature for 10 minutes before slicing.

Tips & Variations

For a graham cracker flavor, toasting the almond flour is essential—it adds depth and aroma.
Use powdered sweetener in the crust for a smoother texture, especially in no-bake recipes.
Coconut oil can replace butter in the crust using the same amount for a dairy-free option.
If key limes are unavailable, regular limes make a fine substitute but with slightly less floral tartness.
If the filling feels too runny, ensure the gelatin is fully dissolved in warm lime juice before mixing.
Add vanilla extract (1 teaspoon) to the filling for a subtle sweet aroma.

Storage

Store the pie covered in the refrigerator for up to 3-4 days. If frozen, allow it to thaw in the fridge overnight or at room temperature for about 10 minutes before slicing. This helps maintain the filling’s creamy texture and crust integrity.

How to Serve

A key lime pie is shown with six slices in total, five arranged in a circle on a white plate and one slice placed on a separate white plate in the foreground. Each slice has a thick, crumbly golden brown crust at the bottom and sides, with a smooth, creamy white filling. On top of each slice, there is a dollop of white whipped cream topped with thin slices of lime and lime zest scattered over the surface. The scene is set on a white marbled texture, with fresh lime halves and wedges placed near the bottom left corner. A small fork with a white handle rests on the plate with the single slice. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

What are key limes and can I substitute regular limes?

Key limes are small, aromatic limes known for their tarter and more floral juice. If you don’t have key limes, regular limes can be used with a slightly different flavor profile but still delicious results.

Can I use store-bought graham cracker crust instead of the almond flour crust?

Yes, you can substitute with a store-bought graham cracker crust if you’re not worried about sugar content. However, toasting almond flour provides a fresh, sugar-free alternative with a unique flavor.