I just made Keto Bars that actually taste like sugar cookies with sugar-free buttercream on top, and if you love baking you won’t believe they’re low carb.

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I am obsessed with these Keto Sugar Cookie Bars because they hit that tender, buttery spot I keep chasing. I love how the blanched almond flour gives a soft, slightly nutty crumb that actually tastes like a real cookie, not cardboard.

And the sugar free buttercream on top? I’m all in.

These feel like Keto Bars you want at every party, without the sad excuses. I adore that they remind me of Keto Christmas Cookies but in bar form so you can grab one and not fuss.

Messy, sweet, dangerously moreish. I will eat too many.

No regrets. Seriously always.

Ingredients

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Almond flour: nutty, dense base that keeps it low carb and nicely moist.
Powdered erythritol: sweet without sugar, can be a bit cooling on the tongue.
Unsalted butter (dough): fat for tender crumb and that classic cookie mouthfeel.
Egg: binds everything together and adds a bit of protein and structure.
Vanilla extract (dough): warm sweetness, makes it taste less “keto” and more familiar.
Baking powder: lift and lightness so bars don’t feel like rocks.
Fine sea salt: balances sweetness and actually makes other flavors pop.
Plus lemon juice or ACV: tiny bit of tang helps rise and brightens flavor.
Xanthan gum: Basically for firmer bars if you don’t want crumbly slices.
Unsalted butter (frosting): rich, creamy base that makes the frosting dreamy.
Powdered erythritol (frosting): smooth sweetener that spreads nicely when sifted.
Heavy cream or almond milk: thins frosting so it spreads without cracking.
Vanilla extract (frosting): simple flavor boost that ties the frosting together.
Pinch of salt (frosting): cuts sweetness and keeps the frosting from tasting flat.

Ingredient Quantities

2 cups (200 g) blanched almond flour

1/3 cup (40 g) powdered erythritol or confectioners Swerve (plus more for dusting if you want)

1/2 cup (113 g) unsalted butter, softened

1 large egg, room temperature

1 teaspoon vanilla extract

1/2 teaspoon baking powder

1/8 teaspoon fine sea salt

1 teaspoon lemon juice or apple cider vinegar (helps with lift, you can skip it)

1/2 teaspoon xanthan gum (optional, for a firmer bar)

For the sugar free buttercream:

1/2 cup (113 g) unsalted butter, softened

1 to 1 1/4 cups (120 to 150 g) powdered erythritol or confectioners Swerve, sifted

1 to 2 tablespoons heavy cream or unsweetened almond milk, as needed for spreading

1 teaspoon vanilla extract

Pinch of salt

How to Make this

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1. Preheat oven to 350°F (175°C) and line an 8×8 inch pan with parchment, leaving an overhang so you can lift the bars out easy later.

2. In a medium bowl whisk together 2 cups blanched almond flour, 1/2 teaspoon baking powder, 1/8 teaspoon sea salt and 1/2 teaspoon xanthan gum if you’re using it. Set aside.

3. In a separate large bowl cream 1/2 cup softened unsalted butter with 1/3 cup powdered erythritol until light and a bit fluffy, about 1 to 2 minutes with a hand mixer or 3 with a wooden spoon if you’re doing it by hand.

4. Beat in 1 large room temperature egg, 1 teaspoon vanilla extract and 1 teaspoon lemon juice or apple cider vinegar until combined. It might look a little curdled, thats fine.

5. Add the dry ingredients to the wet and fold just until combined. The dough should be soft and slightly sticky; if it feels super wet sprinkle an extra tablespoon of almond flour, but dont overdo it.

6. Press the dough evenly into the prepared pan using your fingers or the bottom of a spatula. For neat edges dip your fingers in cold water then smooth the top. Chill in the fridge 10 to 15 minutes if you want cleaner cuts.

7. Bake for 12 to 16 minutes or until the edges are lightly golden and the top is set. Almond flour browns fast so keep an eye on it. Let the bars cool completely in the pan on a wire rack, then use the parchment overhang to lift them out.

8. While bars cool make the sugar free buttercream: beat 1/2 cup softened unsalted butter until creamy, then gradually add 1 to 1 1/4 cups sifted powdered erythritol. Add 1 teaspoon vanilla extract, a pinch of salt, and 1 to 2 tablespoons heavy cream or unsweetened almond milk as needed to reach a spreadable consistency.

9. Spread the buttercream over the cooled bars. For cleaner slices chill the frosted pan 20 to 30 minutes, then slice into squares with a sharp knife warmed under hot water and wiped dry between cuts. Dust with a little extra powdered erythritol if you want it to look like classic sugar cookies.

Equipment Needed

1. 8×8 inch baking pan (lined with parchment with overhang)
2. Parchment paper (enough to cover pan and leave an overhang)
3. Medium and large mixing bowls
4. Hand mixer (or whisk and a sturdy wooden spoon if you want to do it by hand)
5. Measuring cups and spoons (for dry and wet ingredients)
6. Flexible spatula and a wooden spoon for pressing and folding
7. Wire cooling rack
8. Sharp knife (heat under hot water and wipe dry between cuts)

FAQ

Q: Can I make these dairy free or use a different flour?

A: You can swap the butter for a dairy free stick butter or coconut oil, but texture will change and might be slightly greasier. Almond flour is key here, so I do not recommend swapping it for regular flour or coconut flour without changing the recipe, it'll turn out very different.

Q: Do I need the xanthan gum and lemon juice?

A: No, both are optional. Xanthan gum gives a firmer bar and helps it hold together better, useful if you want cleaner slices. The lemon juice or apple cider vinegar helps lift and give a tiny bit of lightness, but you can skip it if you dont have it.

Q: How do I avoid a greasy or crumbly bar?

A: Don't overbake, check at about 12 to 16 minutes depending on pan size. Chill the dough or the baked bars before slicing, that helps firm them up. If bars are too crumbly add 1/4 teaspoon more xanthan gum or an extra egg yolk next time.

Q: Can I use a different sweetener or granulated erythritol?

A: Powdered erythritol or Swerve works best for both dough and frosting because it's fine and gives a sugar cookie texture. If you only have granulated erythritol, pulse it in a blender to make it finer, or use a monk fruit blend labeled for baking. Avoid liquid sweeteners unless you change the recipe, they'll add too much moisture.

Q: How long do these bars keep and can I freeze them?

A: Store unfrosted bars in an airtight container in the fridge for up to 7 days. With frosting, keep them chilled and eat within 4 to 5 days. You can freeze unfrosted bars for up to 3 months, thaw in the fridge, then frost. Frosted bars freeze okay too but frosting can change texture.

Q: My buttercream is gritty, why and how do I fix it?

A: Grittiness usually means the powdered sweetener wasnt fully fine or not sifted. Make sure you sift the confectioners Swerve and beat the buttercream awhile, scrape the bowl and add a little cream to smooth. If it still feels grainy, warm the bowl slightly and whip again.

Keto Sugar Cookie Bars Recipe Substitutions and Variations

Almond flour: swap with finely ground hazelnut flour or superfine pecan meal. Use a 1:1 ratio but expect a slightly oilier, more crumbly bar; press firmly into the pan. If using coconut flour, use only 1/4 to 1/3 cup and add an extra egg because coconut flour soaks up liquid.
Powdered erythritol / Swerve: replace with 1:1 allulose for a softer, less cooling sweetness, or use monk fruit blend 1:1. Allulose can brown more, so watch the bake time.
Unsalted butter: sub with melted coconut oil 1:1 for dairy-free bars, or use ghee 1:1 for a purer butter flavor without lactose. Note coconut oil will firm up when chilled so bars can be firmer at fridge temps.
1 large egg: swap for a flax egg (1 tbsp ground flax + 3 tbsp water, let sit 5 min) if you need egg-free. Texture will be a bit denser and more cookie-like, so add 1 tsp extra liquid if batter seems too dry.

Pro Tips

1) Chill the pressed dough 10 to 15 minutes before baking when you want super clean edges. It firms up fast and helps the bars bake more evenly. If you skip it, they still taste great but might spread or crack.

2) Watch the oven like a hawk because almond flour browns quicker than regular flour. If the top looks like it’s getting dark before the center is set, lower the temp by 25°F and add a couple more minutes. Oven temps lie, so use color and a toothpick test not just the clock.

3) Use xanthan gum only if you want a firmer, less crumbly bar. Start with 1/4 to 1/2 teaspoon if you’re unsure. Too much makes the texture gummy, but none at all can make them fragile especially if you plan to stack or gift them.

4) For the buttercream, always sift the powdered erythritol and add the cream a little at a time. Erythritol can be grainy, so beat longer for a smooth spread. If it’s too stiff, don’t panic, stir in a teaspoon of hot water then cool briefly; if too soft, chill 10 minutes and re-whip. For slicing, warm a sharp knife under hot water, wipe dry and make quick confident cuts for neat squares.

Keto Sugar Cookie Bars Recipe

Recipe by Sammy Hunter

0.0 from 0 votes

I just made Keto Bars that actually taste like sugar cookies with sugar-free buttercream on top, and if you love baking you won't believe they're low carb.

Servings

servings

Calories

246

kcal

Equipment: 1. 8×8 inch baking pan (lined with parchment with overhang)
2. Parchment paper (enough to cover pan and leave an overhang)
3. Medium and large mixing bowls
4. Hand mixer (or whisk and a sturdy wooden spoon if you want to do it by hand)
5. Measuring cups and spoons (for dry and wet ingredients)
6. Flexible spatula and a wooden spoon for pressing and folding
7. Wire cooling rack
8. Sharp knife (heat under hot water and wipe dry between cuts)

Ingredients

2 cups (200 g) blanched almond flour
1/3 cup (40 g) powdered erythritol or confectioners Swerve (plus more for dusting if you want)
1/2 cup (113 g) unsalted butter, softened
1 large egg, room temperature
1 teaspoon vanilla extract
1/2 teaspoon baking powder
1/8 teaspoon fine sea salt
1 teaspoon lemon juice or apple cider vinegar (helps with lift, you can skip it)
1/2 teaspoon xanthan gum (optional, for a firmer bar)
For the sugar free buttercream:
1/2 cup (113 g) unsalted butter, softened
1 to 1 1/4 cups (120 to 150 g) powdered erythritol or confectioners Swerve, sifted
1 to 2 tablespoons heavy cream or unsweetened almond milk, as needed for spreading
1 teaspoon vanilla extract
Pinch of salt

Directions

Preheat oven to 350°F (175°C) and line an 8×8 inch pan with parchment, leaving an overhang so you can lift the bars out easy later.
In a medium bowl whisk together 2 cups blanched almond flour, 1/2 teaspoon baking powder, 1/8 teaspoon sea salt and 1/2 teaspoon xanthan gum if you're using it. Set aside.
In a separate large bowl cream 1/2 cup softened unsalted butter with 1/3 cup powdered erythritol until light and a bit fluffy, about 1 to 2 minutes with a hand mixer or 3 with a wooden spoon if you’re doing it by hand.
Beat in 1 large room temperature egg, 1 teaspoon vanilla extract and 1 teaspoon lemon juice or apple cider vinegar until combined. It might look a little curdled, thats fine.
Add the dry ingredients to the wet and fold just until combined. The dough should be soft and slightly sticky; if it feels super wet sprinkle an extra tablespoon of almond flour, but dont overdo it.
Press the dough evenly into the prepared pan using your fingers or the bottom of a spatula. For neat edges dip your fingers in cold water then smooth the top. Chill in the fridge 10 to 15 minutes if you want cleaner cuts.
Bake for 12 to 16 minutes or until the edges are lightly golden and the top is set. Almond flour browns fast so keep an eye on it. Let the bars cool completely in the pan on a wire rack, then use the parchment overhang to lift them out.
While bars cool make the sugar free buttercream: beat 1/2 cup softened unsalted butter until creamy, then gradually add 1 to 1 1/4 cups sifted powdered erythritol. Add 1 teaspoon vanilla extract, a pinch of salt, and 1 to 2 tablespoons heavy cream or unsweetened almond milk as needed to reach a spreadable consistency.
Spread the buttercream over the cooled bars. For cleaner slices chill the frosted pan 20 to 30 minutes, then slice into squares with a sharp knife warmed under hot water and wiped dry between cuts. Dust with a little extra powdered erythritol if you want it to look like classic sugar cookies.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.