keto lemon bars recipe
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3.74 from 15 votes

Keto Lemon Bars - Low Carb Dessert

These keto lemon bars have a thick rich buttery crust and a silky tangy lemon custard on top. With only 2g net carbs per serving, you can enjoy a decadent keto dessert.
Prep Time10 mins
Cook Time1 hr
Resting Time20 mins
Total Time1 hr 10 mins
Course: Keto Dessert
Cuisine: American
Keyword: keto lemon bar
Servings: 16 keto lemon bars
Calories: 126kcal
Author: Ioana Borcea from


For the crust

  • 1 1/2 cup almond flour
  • 1/2 cup butter
  • 1/4 cup erythritol
  • 1 tsp  vanilla extract
  • 1/8 tsp salt

For the lemon filling

  • 3 medium lemons
  • 3 large eggs
  • 2 tsp lemon zest
  • 3/4 cup almond flour
  • 3/4 cup erythritol


  • Preheat the oven to 350°F and line an 8X8 inch baking pan with parchment paper. Set aside. 
  • For the crust: In a food processor, add the almond flour, melted butter, powdered erythritol vanilla extract and a pinch of salt. Process until a dough forms. You can use a hand mixer.
  • Evenly press the dough into the pan and bake until lightly golden brown, about 15 minutes. Once cooked, let cool for at least 30 minutes.
  • Prepare the filling: Juice all the lemons and add them to a medium bowl.
  • Over the lemon juice, add the room temperature eggs, the sweetener, lemon zest and whisk for 30 seconds. Don't use a hand mixer because overmixing the ingredients will turn your keto lemon bars will crack when baked.
  • Stir in the almond flour and pour the topping over the cooled crust whisking while pouring to ensure that all the ingredients are evenly combined.
  • Bake for about 25 minutes or until the filling has set.
  • Let it cool completely before slicing. Refrigerate for at least 2 hours before slicing. Use a sharp knife to cut them into squares. Enjoy!


Serving: 1keto lemon bar square | Calories: 126kcal | Carbohydrates: 3g | Protein: 3g | Fat: 12g | Saturated Fat: 4g | Cholesterol: 49mg | Sodium: 86mg | Potassium: 22mg | Fiber: 1g | Sugar: 0g | Vitamin A: 235IU | Vitamin C: 2.6mg | Calcium: 42mg | Iron: 0.8mg | Net Carbs: 2g