Keto Lemon Butter Breakfast Bars: The Perfect Low-Carb Morning Treat

If you’re on a keto diet and craving something sweet for breakfast, these Keto Lemon Butter Breakfast Bars are exactly what you need. They’re tangy, buttery, and perfectly soft with just the right amount of sweetness. Plus, they’re packed with healthy fats to keep you full and energized throughout the morning.

Most keto recipes either turn out too dry or taste too much like artificial sweeteners. But not this one. These bars have a melt-in-your-mouth texture, and the bright lemon flavor makes them impossible to resist.

Whether you need a quick grab-and-go breakfast, a light snack, or a healthy dessert, these bars will be your new favorite.

Why You’ll Love These Keto Lemon Butter Bars

  • Super easy to make – You only need one bowl and 10 minutes of prep time.
  • No weird ingredients – Everything used is common in most keto kitchens.
  • Low-carb & sugar-free – Perfect for staying in ketosis while satisfying your sweet tooth.
  • Tastes like real dessert – No chalky or artificial aftertaste.

These bars are perfect for anyone following a keto, low-carb, or gluten-free lifestyle. And honestly? Even if you’re not on a strict diet, you’ll still love them.

Ingredients You’ll Need

For the crust:

  • 1 cup almond flour (finely ground for the best texture)
  • ¼ cup coconut flour (helps with firmness)
  • ¼ cup granulated erythritol or monk fruit sweetener
  • ½ teaspoon salt
  • ½ cup unsalted butter, melted
  • 1 teaspoon vanilla extract

For the lemon filling:

  • 3 large eggs
  • ¾ cup granulated erythritol (or your favorite keto sweetener)
  • ½ cup fresh lemon juice (about 2-3 lemons)
  • 2 tablespoons lemon zest
  • ¼ cup coconut flour (for thickening)
  • ¼ teaspoon baking powder
  • ½ teaspoon vanilla extract

For topping:

  • Powdered erythritol (for a classic dusted look)
  • Lemon zest (for extra flavor)

Step-by-Step Instructions

Step 1: Preheat and Prepare the Baking Dish

  • Preheat your oven to 350°F (175°C).
  • Line an 8×8-inch baking dish with parchment paper. This makes it easier to lift the bars out after baking.

Step 2: Make the Crust

  • In a mixing bowl, combine almond flour, coconut flour, erythritol, and salt.
  • Add the melted butter and vanilla extract, stirring until the mixture looks like crumbly dough.
  • Press the mixture evenly into the bottom of the baking dish.
  • Bake for 10-12 minutes, or until lightly golden.
  • Let it cool while you make the lemon filling.

Step 3: Prepare the Lemon Filling

  • In a large mixing bowl, whisk together eggs and erythritol until smooth.
  • Add the lemon juice, lemon zest, and vanilla extract.
  • Sift in the coconut flour and baking powder, stirring until well combined.
  • Pour the mixture over the pre-baked crust.

Step 4: Bake the Bars

  • Bake for 18-22 minutes, or until the center is set and doesn’t jiggle when you shake the pan.
  • Remove from oven and let the bars cool completely before slicing.

Step 5: Add the Finishing Touches

  • Once cooled, sprinkle with powdered erythritol for that classic lemon bar look.
  • Add a little extra lemon zest on top for an extra citrusy kick.

Tips for Perfect Keto Lemon Bars

  • Use fresh lemons – Bottled lemon juice lacks the same bright flavor.
  • Don’t overbake – If you bake them too long, the bars will turn dry.
  • Let them cool – Cutting too soon can make them fall apart.
  • Chill for better texture – Pop them in the fridge for a couple of hours for the best firmness.
  • Use the right sweetener – Erythritol or monk fruit works best. Avoid liquid sweeteners as they can change the texture.

How to Store Keto Lemon Butter Bars

Refrigerator

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

Freezer

Freeze the bars in a single layer on a baking sheet. Once frozen, transfer to a ziplock bag and store for up to 3 months.

Thawing

Let them thaw at room temperature for 15-20 minutes before serving.

How These Bars Fit into a Keto Diet

Each bar is low in carbs, high in fat, and sugar-free, making them perfect for keto. Here’s a rough breakdown per serving (assuming you cut them into 9 bars):

  • Calories: 160
  • Fat: 14g
  • Carbs: 4g
  • Fiber: 2g
  • Net Carbs: 2g
  • Protein: 4g

They make a great breakfast, snack, or dessert without kicking you out of ketosis.

What to Serve with Keto Lemon Bars

  • Coffee or Tea – A great way to balance the citrusy flavor.
  • Whipped Cream – If you want something extra rich, add a dollop of sugar-free whipped cream.
  • Berries – A handful of raspberries or blueberries pairs beautifully.

Conclusion

If you’re looking for an easy keto recipe that actually tastes like a treat, these Keto Lemon Butter Breakfast Bars are perfect. They’re buttery, tangy, and just the right amount of sweet—all while staying low in carbs.

Make a batch today and store them for an easy breakfast or snack throughout the week. If you love them, share the recipe with a fellow keto friend.

Print

Keto Lemon Butter Breakfast Bars

These Keto Lemon Butter Breakfast Bars are soft, buttery, and packed with fresh lemon flavor. They have a rich almond flour crust and a smooth, tangy lemon filling—all while staying low-carb, sugar-free, and gluten-free. Perfect for the keto diet, these bars make a great breakfast, snack, or dessert. Easy to make with simple ingredients!

  • Author: Jane Summerfield
  • Prep Time: 10 minutes
  • Cook Time: 22 minutes
  • Total Time: 32 minutes
  • Yield: 9 bars 1x
  • Category: Dessert
  • Method: Baking
  • Cuisine: American, Keto, Low-Carb
  • Diet: Gluten Free

Ingredients

Scale

For the Crust:

  • 1 cup almond flour
  • ¼ cup coconut flour
  • ¼ cup granulated erythritol
  • ½ teaspoon salt
  • ½ cup unsalted butter, melted
  • 1 teaspoon vanilla extract

For the Lemon Filling:

  • 3 large eggs
  • ¾ cup granulated erythritol
  • ½ cup fresh lemon juice (about 23 lemons)
  • 2 tablespoons lemon zest
  • ¼ cup coconut flour
  • ¼ teaspoon baking powder
  • ½ teaspoon vanilla extract

For Topping:

  • Powdered erythritol
  • Lemon zest

Instructions

  1. Preheat the Oven & Prepare the Pan

    • Preheat oven to 350°F (175°C).
    • Line an 8×8-inch baking dish with parchment paper.
  2. Make the Crust

    • In a bowl, mix almond flour, coconut flour, erythritol, and salt.
    • Stir in the melted butter and vanilla extract until combined.
    • Press the mixture into the bottom of the baking dish.
    • Bake for 10-12 minutes until lightly golden. Let cool.
  3. Make the Lemon Filling

    • In a large bowl, whisk eggs and erythritol until smooth.
    • Add lemon juice, lemon zest, and vanilla extract.
    • Sift in coconut flour and baking powder, stirring until smooth.
    • Pour over the cooled crust.
  4. Bake the Bars

    • Bake for 18-22 minutes, or until the center is set.
    • Let the bars cool completely before slicing.
  5. Add Toppings & Serve

    • Dust with powdered erythritol and extra lemon zest.
    • Slice into squares and enjoy!

Notes

  • Use fresh lemon juice for the best flavor.
  • Do not overbake—the bars will firm up as they cool.
  • Chill before serving for better texture.
  • Store in the fridge for up to 5 days or freeze for 3 months.

Please note: The recipe or ingredients shown in the video might vary slightly from what’s listed here. Use the video as an illustration, but for the best results, you might want to stick to the recipe provided in this article.

Nutrition

  • Serving Size: 1 bar
  • Calories: 160 Sugar: 0g Sodium: 60mg Fat: 14g Saturated Fat: 7g Unsaturated Fat: 6g Trans Fat: 0g Carbohydrates: 4g Fiber: 2g Net Carbs: 2g Protein: 4g Cholesterol: 55mg

Did you make this recipe?

Share a photo and tag us — we can't wait to see what you've made!

Frequently Asked Questions (FAQs)

Can I use coconut flour instead of almond flour?

Not entirely. Coconut flour absorbs a lot of moisture, so if replacing almond flour, you’ll need less coconut flour and more eggs or liquid.

What sweetener works best for these bars?

A blend of erythritol and monk fruit gives the best flavor. Stevia can work, but some people find it leaves a bitter aftertaste.

Are these bars dairy-free?

Not as written, but you can replace the butter with coconut oil for a dairy-free version.

Can I make them nut-free?

Yes! Swap the almond flour for sunflower seed flour or a mix of coconut flour and a bit more butter.