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Close-up of soft and chewy keto lemon bar cookies topped with powdered sweetener on a white plate

Keto Lemon Bar Cookies – A Bright Bite of Sweetness Without the Guilt


  • Author: Diana Carrozza
  • Total Time: 40 minutes
  • Yield: 8 cookies (4 servings of 2 cookies each) 1x

Description

Soft, chewy, and citrusy low-carb lemon bar cookies, perfect for keto diets all year round.

Ingredients

Scale

For the Cookie Base:

  • 1 cup almond flour

  • 2 tbsp coconut flour

  • ¼ cup granulated erythritol (like Swerve or Lakanto)

  • ¼ tsp baking powder

  • ⅛ tsp salt

  • ¼ cup unsalted butter, softened

  • 1 tsp vanilla extract

  • 1 egg

For the Lemon Topping:

  • ¼ cup lemon juice (freshly squeezed)

  • 1 tbsp lemon zest

  • 2 eggs

  • ⅓ cup powdered erythritol

  • 2 tbsp almond flour

  • 1 tbsp coconut flour

  • Optional: ¼ tsp turmeric (for color)


Instructions

🧁 Step 1: Prepare the Cookie Dough

  1. Preheat your oven to 350°F (175°C) and line a small baking pan (8×8”) with parchment paper.

  2. In a bowl, whisk together almond flour, coconut flour, baking powder, and salt.

  3. In a separate bowl, cream the softened butter and granulated erythritol until fluffy.

  4. Add in the egg and vanilla extract, then mix until well combined.

  5. Slowly add the dry ingredients into the wet mixture and stir until a dough forms.

Tip: If the dough feels too sticky, chill it for 10–15 minutes to make it easier to spread.

  1. Press the dough evenly into the lined pan and bake for 10–12 minutes or until lightly golden around the edges. Set aside to cool.


🍋 Step 2: Make the Lemon Filling

  1. In a mixing bowl, whisk the eggs until smooth.

  2. Add lemon juice, lemon zest, powdered erythritol, almond flour, and coconut flour. Whisk until lump-free.

  3. Optionally add turmeric for a richer yellow hue.

Pro Tip: Strain the lemon mixture if you prefer a silky-smooth texture.


🔄 Step 3: Assemble & Bake Again

  1. Once the base has cooled slightly, pour the lemon topping over it evenly.

  2. Return the pan to the oven and bake at 325°F (160°C) for 15–18 minutes or until the center is set.

  3. Allow to cool completely, then refrigerate for at least 2 hours for best results.


✂️ Step 4: Slice & Serve

Cut into 8 cookies and enjoy! These store beautifully in the fridge for up to 5 days and freeze well too.

Notes

Store in fridge up to 5 days or freeze for up to 1 month. Optional turmeric for color.
  • Prep Time: 15 minutes
  • Cook Time: 25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 2 cookies
  • Calories: 175
  • Sugar: 0.5g (natural from lemon)
  • Sodium: 55mg
  • Fat: 15g
  • Saturated Fat: 7g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 4g total (2.5g net)
  • Fiber: 1.5g
  • Protein: 4g
  • Cholesterol: 65mg

Keywords: keto lemon bar cookies, low carb lemon dessert, keto cookies, sugar-free lemon cookies