Keto Lemon Bars Recipe
Introduction
These Keto Lemon Bars offer a delightful balance of tangy lemon flavor and a rich, almond flour crust, perfect for anyone on a low-carb diet. Easy to make and naturally sweetened, they provide a refreshing treat without the guilt.

Ingredients
- 2 cups almond flour
- 6 tablespoons butter (melted)
- 3 tablespoons powdered sugar-free sweetener (like erythritol or monk fruit blend)
- 4 large eggs (beaten)
- ½ cup powdered sugar-free sweetener
- 1 teaspoon xanthan gum
- ½ cup fresh lemon juice (from about 2 lemons)
- Pinch of salt
Instructions
- Step 1: Preheat your oven to 350°F (175°C) and lightly grease a 9×9 inch baking dish.
- Step 2: In a medium bowl, combine the almond flour, melted butter, and 3 tablespoons of powdered sugar-free sweetener. Stir until the mixture is well blended.
- Step 3: Transfer the crust mixture into your prepared baking dish and gently press it down evenly to form the base using the bottom of a flat cup or your fingers.
- Step 4: Place the dish in the preheated oven and bake for 20 minutes, or until the crust turns a light golden brown. Remove from oven and set aside.
- Step 5: While the crust is baking, prepare the lemon filling. In a blender or using an immersion blender, combine the beaten eggs, ½ cup powdered sugar-free sweetener, xanthan gum, lemon juice, and a pinch of salt. Blend until completely smooth and creamy.
- Step 6: Carefully pour the lemon filling evenly over the warm, baked crust in the dish.
- Step 7: Return the dish to the oven and bake for an additional 15 minutes, or until the filling is set and no longer jiggly in the center.
- Step 8: Remove the lemon bars from the oven and let them cool for at least 10 minutes. For a pretty finish, sift a little extra powdered sugar-free sweetener over the top before cutting into 9 squares. Enjoy your refreshingly tangy and healthy treat!
Tips & Variations
- Use fresh lemon juice for the best flavor; bottled juice can taste dull.
- For a nuttier crust, lightly toast the almond flour before mixing it with butter.
- Switch xanthan gum with guar gum if unavailable, using the same amount.
- Add a few drops of lemon extract to intensify the lemon flavor if desired.
Storage
Store the lemon bars in an airtight container in the refrigerator for up to 4 days. They can also be frozen for up to 1 month; thaw in the fridge before serving. Reheat briefly at room temperature or enjoy chilled.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use a different sweetener?
Yes, you can substitute with other powdered, sugar-free sweeteners that measure like sugar, such as allulose or stevia blends. Keep in mind that sweetness levels and textures may vary slightly.
What if I don’t have xanthan gum?
If xanthan gum is not available, you can use an equal amount of guar gum as a thickening agent. Alternatively, the filling may be a bit less set but should still turn out delicious.
Print
Keto Lemon Bars Recipe
- Total Time: 50 minutes
- Yield: 9 servings 1x
- Diet: Low Carb
Description
Delight in these refreshing Keto Lemon Bars, a perfect low-carb dessert that combines a buttery almond flour crust with a tangy lemon filling. Sweetened naturally with sugar-free sweeteners like erythritol or monk fruit, this recipe delivers a guilt-free, zesty treat that’s easy to make and perfect for keto and low-carb diets.
Ingredients
Crust
- 2 cups almond flour
- 6 tablespoons butter, melted
- 3 tablespoons powdered sugar-free sweetener (erythritol or monk fruit blend)
Filling
- 4 large eggs, beaten
- 0.5 cup powdered sugar-free sweetener
- 1 teaspoon xanthan gum
- 0.5 cup fresh lemon juice (from about 2 lemons)
- Pinch of salt
Instructions
- Preheat Oven and Prepare Baking Dish: Preheat your oven to 350°F (175°C) and lightly grease a 9×9 inch baking dish to prevent sticking.
- Make the Crust Mixture: In a medium bowl, combine the almond flour, melted butter, and 3 tablespoons of powdered sugar-free sweetener. Stir thoroughly until the mixture is well blended.
- Form the Crust: Transfer the crust mixture into the prepared baking dish and gently press it down evenly using the bottom of a flat cup or your fingers to create an even base layer.
- Bake the Crust: Place the baking dish in the preheated oven and bake for 20 minutes, or until the crust turns a light golden brown. Remove from oven and set aside to cool slightly.
- Prepare the Lemon Filling: While the crust bakes, blend together the beaten eggs, 0.5 cup powdered sugar-free sweetener, xanthan gum, fresh lemon juice, and a pinch of salt using a blender or immersion blender until the mixture is smooth and creamy.
- Pour Filling Over Crust: Carefully pour the smooth lemon filling evenly over the warm baked crust in the baking dish.
- Bake the Filled Bars: Return the dish to the oven and bake for an additional 15 minutes, or until the lemon filling is set and no longer jiggly in the center.
- Cool and Serve: Remove the lemon bars from the oven and allow them to cool for at least 10 minutes. For a decorative touch, sift a little extra powdered sugar-free sweetener over the top. Cut into 9 equal squares and enjoy your healthy, tangy-sweet keto treat!
Notes
- Use fresh lemon juice for the best flavor and natural acidity.
- Ensure the eggs are fully blended for a smooth filling texture.
- Xanthan gum helps thicken the filling without adding carbs.
- Use a sugar-free powdered sweetener that measures like sugar for accurate sweetness.
- Allow bars to cool properly before slicing to maintain their shape.
- Store leftover lemon bars in an airtight container in the refrigerator for up to 5 days.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: Keto lemon bars, low carb dessert, sugar-free lemon bars, almond flour dessert, keto lemon dessert

