Keto Creamy Lemon Square Bars

These bars deliver the perfect balance of tart, creamy lemon filling and a buttery shortbread crust, all with ~3g net carbs per bar. They’re sugar-free, gluten-free, and taste incredibly indulgent.

Ingredients

For the Shortbread Crust:

• 1 ½ cups (150g) super-fine blanched almond flour

• ⅓ cup (75g) granulated keto sweetener (like Allulose or Erythritol-based blend)

• ¼ teaspoon salt

• ⅓ cup (75g) unsalted butter, melted and cooled slightly

• ½ teaspoon vanilla extract (optional)

For the Lemon Cream Filling:

• 1 cup (240ml) fresh lemon juice (about 4-6 large lemons)

• Zest of 2 lemons

• 1 ¼ cups (250g) granulated keto sweetener (Allulose recommended to prevent crystallization)

• 6 large egg yolks (save whites for another use)

• ½ cup (113g) unsalted butter, cut into small pieces

• 3 (8 oz) packages full-fat cream cheese, softened to room temperature

• Optional: 1-2 drops liquid stevia or lemon extract to boost flavor without carbs

For Dusting (Optional):

• Powdered keto sweetener (like powdered erythritol or monk fruit blend)

Step-by-Step Instructions

Part 1: Make & Bake the Crust

1. Preheat & Prep: Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving an overhang for easy removal.

2. Mix Crust: In a medium bowl, whisk together almond flour, sweetener, and salt. Stir in melted butter and vanilla until a crumbly dough forms.

3. Press & Bake: Press dough firmly and evenly into the bottom of the prepared pan. Prick all over with a fork.

4. Bake for 12-15 minutes, until lightly golden. Let cool completely on a wire rack. Reduce oven temperature to 325°F (160°C).

Part 2: Make the Lemon Curd Cream Cheese Filling

1. Create Double Boiler: Fill a medium saucepan with 1-2 inches of water and bring to a simmer. Place a heatproof bowl on top (it shouldn’t touch the water).

2. Make Lemon Curd Base: In the bowl, whisk together lemon juice, lemon zest, sweetener, and egg yolks until smooth.

3. Cook Curd: Cook over simmering water, whisking constantly, for 10-15 minutes until the mixture thickens noticeably and coats the back of a spoon.

4. Incorporate Butter: Remove from heat. Whisk in the pieces of butter, one at a time, until fully melted and incorporated. Let cool for 15 minutes.

5. Combine with Cream Cheese: In a large bowl, beat the softened cream cheese until completely smooth. While beating on low, gradually pour in the slightly cooled lemon curd. Beat until perfectly smooth and uniform. Taste and adjust sweetness/tartness if needed.

Part 3: Assemble & Chill

1. Pour the lemon cream filling over the completely cooled crust. Smooth the top with a spatula.

2. Bake at 325°F for 20-25 minutes. The center should still have a slight jiggle—it will firm up as it chills.

3. Cool & Chill: Let the pan cool to room temperature on a wire rack, then cover and refrigerate for at least 6 hours, preferably overnight.

Part 4: Serve

1. Use the parchment paper to lift the entire square out of the pan. Place on a cutting board.

2. Slice into 16 squares. Wipe the knife clean between cuts for neat bars.

3. Dust with powdered keto sweetener just before serving, if desired.

Key Success Tips for Keto Lemon Bars

• Sweetener Choice is Critical: Allulose is the best choice for the filling as it doesn’t recrystallize when chilled (erythritol can get gritty). A monk fruit/erythritol blend works well for the crust.

• Room Temperature Cream Cheese: This is non-negotiable for a smooth, lump-free filling.

• Patience with Chilling: These bars must chill thoroughly to set properly. Don’t rush it.

• Fresh Lemon Juice: Bottled juice lacks the bright, vibrant flavor. Fresh is essential.

• Thickening the Filling: The double-boiler method gently cooks the eggs for a safe, smooth curd. Whisk constantly to avoid scrambling.

Storage

• Store in an airtight container in the refrigerator for up to 5 days.

• For longer storage, freeze individual bars on a parchment-lined sheet, then transfer to a freezer bag. Freeze for up to 2 months. Thaw in the refrigerator overnight.

Enjoy this bright, creamy, and truly satisfying keto-friendly dessert that proves you don’t need sugar to enjoy a classic lemon bar!