Every "sugar-free powdered sugar" on the shelf claims it measures cup for cup. The labels tell a more useful story than the marketing copy. We pulled the nutrition panels, ingredient lists and per-ounce prices for four brands made to replace confectioners' sugar. Then we checked which numbers actually hold up.
Key takeaways
- All four brands calculate to 0g net carbs per serving once you subtract sugar alcohols or allulose from total carbohydrate — the differences are in price, ingredients, and side effects, not carb count.
- Swerve Confectioners is the cheapest per ounce at $0.67/oz ($7.99 for 12 oz, swervesweet.com) and is erythritol plus tapioca starch.
- Besti Powdered Monk Fruit Allulose Blend is the only one of the four with no sugar alcohol — it's allulose and monk fruit extract, and costs the most per ounce at $1.25/oz ($14.99 for 12 oz, netrition.com).
- Three of the four (Swerve, Lakanto, Sukrin Icing) contain erythritol, a sugar alcohol the Cleveland Clinic says can cause gas and nausea in large amounts.
- None of the four list wheat, tree nuts, or peanuts as ingredients or allergens on the pages we checked.
- Erythritol-based powders can turn gritty as baked goods cool because erythritol recrystallizes at low solubility; allulose behaves closer to real sugar and browns at a lower temperature than sucrose.
Sugar-free powdered sugar comparison
Net carbs below are calculated as total carbohydrate minus sugar alcohol/allulose grams, using the number printed on each product's own nutrition panel or retailer listing.
| Product | Serving size | Calories | Net carbs (calculated) | Contains sugar alcohol? | Price per oz | Buy |
|---|---|---|---|---|---|---|
| Swerve Confectioners | 1 tsp (5g) | 1 | 0g (5g total carb − 5g erythritol) | Yes — erythritol | $0.67 | Check price → |
| Sukrin Icing (Melis) | 6g | 0 | 0g (6g total carb − 6g erythritol) | Yes — erythritol | $0.92 | |
| Lakanto Powdered Monkfruit Sweetener | 1/4 cup (30g) | 0 | 0g (30g total carb − 30g erythritol) | Yes — erythritol | $1.05 | Check price → |
| Besti Powdered Monk Fruit Allulose Blend | 1 tsp (3g) | 0 | 0g (label lists 0g net carbs; carb is allulose) | No — allulose, not a sugar alcohol | $1.25 | Check price → |
How we ranked these
We ranked on what's printed on the label or the retailer listing, not on how anything tastes. We used four criteria, in this order. First, net carbs per serving, figured the same way for every product: total carbohydrate minus sugar alcohol or allulose grams. Second, the first ingredients, and whether the product contains a sugar alcohol, wheat or nuts. Third, certifications the brand actually states (Non-GMO Project Verified, vegan, gluten-free). Fourth, price per ounce, based on the package size and the price at the retailer linked in the Sources section below. When we mention taste or texture, we say plainly where it comes from. It is either the maker's claim or a prediction from how that sweetener behaves chemically. We have not baked with or tasted any of these products.
Swerve Confectioners
Ingredients: erythritol, tapioca starch, natural flavor (swervesweet.com). Per serving (1 tsp/5g): 1 calorie, 5g total carbohydrate, 0g fiber, 0g sugar, 5g erythritol — 0g net carbs calculated. Certifications: labeled gluten-free on the brand's own product page. Price: $7.99 for 12 oz at swervesweet.com, or $0.67/oz — the cheapest of the four on a per-ounce basis.
Swerve is the brand most bakeries default to for icing. The maker says it adds tapioca starch to keep the erythritol from clumping. That's the brand's stated reason, not something we checked by mixing a batch. Chemistry predicts the trade-off. Erythritol tends to form crystals again as it cools. Food-science reporting on this (see Sources) explains why a Swerve buttercream can feel slightly gritty a few hours after it's made. If you've read our erythritol vs stevia comparison, this is the same crystal problem in powdered form.
Sukrin Icing (Sukrin Melis)
Ingredients: erythritol, less than 2% steviol glycosides (stevia) (netrition.com). Per serving (6g): 0 calories, 6g total carbohydrate, 0g sugar, 6g erythritol — 0g net carbs calculated. Certifications: non-GMO, no artificial colors or preservatives per the retailer listing. Price: $12.99 for 14.1 oz (400g) at netrition.com, or $0.92/oz.
Sukrin adds a small amount of stevia to erythritol. Makers often do this to round out erythritol's flavor without adding calories. Stevia has a well-known aftertaste of its own: a lingering bitterness at higher amounts. It makes up under 2% of this formula, so that's a small amount. Still, that's a chemistry-based prediction, not a tasting note from us. If you're stocking a diabetic-friendly pantry, see our gluten-free, sugar-free baking guide. It covers how erythritol-stevia blends fit into a full recipe, not just the sweetener swap.
Lakanto Powdered Monkfruit Sweetener with Erythritol
Ingredients: non-GMO erythritol and monk fruit extract — no maltodextrin or artificial flavoring, per lakanto.com. Per serving (1/4 cup/30g): 0 calories, 30g total carbohydrate, 0g fiber, 0g sugar, 30g erythritol — 0g net carbs calculated. Certifications: Non-GMO Project Verified and vegan-certified, stated on the brand's own product page. Price: $16.79 for 16 oz at lakanto.com, which the brand itself lists as $1.05/oz — the most expensive of the three erythritol-based options here.
Lakanto adds monk fruit extract to erythritol to soften the cooling feeling erythritol gives on its own. Monk fruit extract gets its sweetness from compounds called mogrosides. It is very sweet in tiny amounts, so it's there mostly to round out the flavor, not to add bulk. The bulk still comes from the erythritol, and so does the risk of gritty crystals. That's a chemistry-based read of the ingredient list, not a taste test. To see how monk fruit compares with other sweeteners, read our roundup of monk fruit sweeteners without erythritol.
Besti Powdered Monk Fruit Allulose Blend
Ingredients: allulose, monk fruit extract — no erythritol (netrition.com, Amazon listing). Per serving (1 tsp/3g): 0 calories, 3g total carbohydrate, 0g sugar; the retailer's nutrition panel lists 0g net carbs. Certifications: Non-GMO, per the Amazon listing title. Price: $14.99 for 12 oz at netrition.com, or $1.25/oz — the priciest option here.
This is the only product here built on allulose instead of erythritol. That changes the chemistry, not just the marketing. Allulose is a reducing sugar, a type of sugar that reacts readily with heat. It drives the Maillard reaction, the browning that real sugar causes in baked goods. Food-manufacturing research on allulose (see Sources) says it starts to caramelize around 220°F. That is some 30–40°C lower than sucrose, or table sugar. So it's more likely to brown baked goods evenly than the three erythritol blends above. It's also less likely to form gritty crystals. This is a prediction based on how the two molecules behave, since we have not baked with either. For the fuller rundown, see allulose as a sugar substitute for baking.
Who should buy which one
Buy Swerve or Sukrin if price per ounce matters most and you don't mind erythritol. Both cost under $1/oz, and neither lists wheat or nuts. Buy Lakanto if you want Non-GMO Project Verified and vegan certification stated on the label. You'll pay roughly 55–60% more per ounce than Swerve for it. Buy Besti if you or someone you're baking for reacts to erythritol. The Cleveland Clinic notes that sugar alcohols can cause gas or nausea in some people at higher intakes. Besti is the only erythritol-free option, and it has the highest per-ounce price of the four. Skip all four if two things are true. You're baking for someone with a known sugar alcohol sensitivity. You also want the closest browning match to real sugar without paying Besti's premium. In that case, look separately for a small-batch allulose product priced closer to the erythritol blends. We didn't find one that met our checking standard for this roundup.
None of these four replaces flour or starch. So they won't fix gritty texture from a gluten-free flour blend. That's a separate problem with a separate fix. If swapping sweeteners is new to you, start with our guide to choosing sugar alternatives. Then read what sugar actually does in a recipe. Both explain the basics before you start swapping brands.
Frequently asked questions
Is there a sugar-free powdered sugar that measures cup for cup like regular powdered sugar?
Yes. All four brands here are labeled as 1:1 replacements for confectioners' sugar. That means you use the same volume you would of regular powdered sugar. The weight will differ slightly, since these products aren't the same density as cane sugar. Weighing instead of scooping gives a more consistent result. See our confectioner's sugar ingredient page for how it compares by weight.
Does sugar-free powdered sugar have net carbs?
Based on the labels we checked, each of these four works out to 0g net carbs per serving. That's after you subtract the sugar alcohol or allulose grams from total carbohydrate. The total carbohydrate number on the label is higher, from 5g to 30g depending on serving size. That's because it includes the sugar alcohol or allulose before you subtract it.
Why does some sugar-free powdered sugar have a cooling aftertaste?
The cooling feeling comes from erythritol. It absorbs heat from your mouth as it dissolves in saliva. (Chemists call this a strongly negative heat of solution.) Three of the four products here list erythritol as a main ingredient: Swerve, Sukrin and Lakanto. Besti's allulose-based formula doesn't cause this effect the same way, based on how the two molecules dissolve.
Can I use sugar-free powdered sugar for royal icing?
Brands market the erythritol-based powders (Swerve, Sukrin, Lakanto) for icings and glazes because of their fine grind. But food-science reporting on erythritol says crystals can make icing feel gritty after a few hours. We haven't tested any of these in a royal icing recipe ourselves. So treat the grind and the maker's stated use as the signal you can check, not a texture guarantee.
Is erythritol powdered sugar safe for keto baking?
All three erythritol-based products here work out to 0g net carbs per serving. That's why they're marketed for keto diets. The Cleveland Clinic's article on erythritol focuses mainly on research led by its own Dr. Stanley Hazen. That research links high erythritol intake to more blood clotting and a greater risk of heart attack and stroke. That is a bigger safety question than the gas or nausea erythritol can also cause in large amounts. It's worth reading that source directly rather than a brand's marketing copy.
Sources
- Swerve Confectioners product page — swervesweet.com
- Swerve Sweetener Powder, Confectioners, 12 oz — Amazon listing
- Sukrin Icing 14.1 oz — netrition.com
- Powdered 1:1 Monk Fruit Sweetener — lakanto.com
- Lakanto Powdered Monkfruit Sweetener nutrition facts — MyFoodDiary
- Wholesome Yum Besti Powdered Monk Fruit Allulose Blend — netrition.com
- Wholesome Yum Besti Powdered Sugar Substitute, 12oz — Amazon listing
- Is Erythritol Bad for You? Uses and Side Effects — Cleveland Clinic
- Taming the Burn: Controlling Allulose's Quick Browning — Icon Foods
- How to Keep Erythritol From Crystallizing — Grassfields Cheese
Written by
Co-founder, BakingSubs
Co-founder of BakingSubs, where he turns the science of ingredient substitutions into tested, reliable guidance for home bakers.
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