Sugar-Free Keto Lemon Bars

These sugar-free keto lemon bars feature a buttery almond flour crust and a creamy, custard-like lemon filling that is tangy, bright, and refreshingly zesty. Made with erythritol or monk fruit sweetener, fresh lemon juice and zest, and rich cream cheese, they deliver classic bakery-style lemon bar flavor without sugar or grains. Each bar is perfectly sliceable, slightly crisp at the base, and smooth on top, making this an ideal keto dessert for satisfying sweet cravings while staying low-carb.

Course Dessert, Snack

Cuisine American

Keyword almond flour, baked keto dessert, cream cheese, gluten free, keto lemon bars, lemon, low carb dessert, sugar free dessert

Prep Time 15

Cook Time 30

Total Time 45

Servings bars

Calories 150kcal

Equipment

8x8 inch baking pan
Parchment Paper
Mixing Bowls
Whisk
hand mixer or stand mixer
Rubber spatula
microplane or grater for zest
measuring cups and spoons
Oven
wire cooling rack

Ingredients

For the almond flour crust

1 1/2 cups fine blanched almond flour
1/3 cup granulated erythritol or monk fruit erythritol blend
1/4 teaspoon fine sea salt
6 tablespoons unsalted butter, melted and slightly cooled
1 teaspoon pure vanilla extract optional

For the creamy lemon filling

8 ounces full-fat cream cheese, softened
3/4 cup powdered erythritol or powdered monk fruit erythritol blend
4 large eggs at room temperature
1/2 cup freshly squeezed lemon juice from about 3 lemons
1 tablespoon finely grated lemon zest from about 2 lemons
1/4 cup heavy whipping cream at room temperature
1 teaspoon pure vanilla extract optional but recommended
1/8 teaspoon fine sea salt

For topping (optional)

2 tablespoons powdered erythritol or powdered monk fruit erythritol blend for dusting after baking
1 teaspoon finely grated lemon zest for garnish

Instructions

Preheat the oven to 350°F and line an 8x8 inch baking pan with parchment paper, leaving an overhang on two sides for easy lifting.
In a medium bowl whisk together the almond flour, granulated sweetener, and salt until well combined.
Pour in the melted butter and vanilla and stir with a spatula until the mixture forms a soft, evenly moistened dough that holds together when pressed.
Transfer the crust mixture to the prepared pan and press it firmly and evenly into the bottom using your fingers or the flat bottom of a measuring cup.
Bake the crust for 12 to 14 minutes until lightly golden around the edges, then remove from the oven and let it cool slightly while you prepare the filling.
Reduce the oven temperature to 325°F to prepare for baking the lemon filling.
In a large mixing bowl beat the softened cream cheese with a hand mixer until very smooth and free of lumps.
Add the powdered sweetener and beat again until the mixture is fluffy and well incorporated, scraping down the sides of the bowl as needed.
Whisk together the eggs in a separate small bowl, then add them to the cream cheese mixture along with the lemon juice, lemon zest, heavy cream, vanilla, and salt.
Beat on low to medium speed just until the filling is smooth and evenly combined, avoiding overbeating so you do not introduce too many air bubbles.
Pour the lemon filling over the parbaked crust and gently tilt the pan or use a spatula to spread it into an even layer that reaches all corners.
Bake at 325°F for 18 to 22 minutes until the edges are set and the center still has a slight jiggle when the pan is gently shaken.
Place the pan on a wire rack and allow the lemon bars to cool completely to room temperature so the filling can finish setting.
Transfer the cooled pan to the refrigerator and chill for at least 2 hours or until the bars are fully cold and firm for clean slicing.
Use the parchment overhang to lift the chilled slab from the pan, place it on a cutting board, and cut into 16 squares with a sharp knife, wiping the blade between cuts if needed.
Dust the tops lightly with powdered sweetener and sprinkle with extra lemon zest just before serving, if desired.
Store leftover lemon bars in an airtight container in the refrigerator for up to 1 week or freeze in a single layer before stacking with parchment between layers for up to 1 month.

Notes

For the smoothest filling, make sure the cream cheese, eggs, and cream are at room temperature before mixing so they blend without lumps. Adjust sweetness to your taste by briefly tasting a small spoonful of filling before adding the raw eggs, then sweetening to preference. To keep the texture creamy, remove the bars from the oven while the center still has a gentle wobble because they will finish setting as they cool. For an extra bakery-style twist, add a pinch of poppy seeds to the filling or a splash of vanilla to the crust. Each bar is designed to be low in carbs and high in satisfying fats, making it a reliable make-ahead keto dessert to enjoy throughout the week.

Nutrition