Sugar-Free Toasted Marshmallow Syrup

This is the sugar-free version of our Toasted Marshmallow Syrup — same broiling-and-melting method, with allulose-sweetened marshmallows standing in for the regular kind.

An Honest Note Before You Make This

Every other sugar-free syrup on this site lands at near-zero calories, because they’re just water, a zero-calorie sweetener, and a splash of extract. This one doesn’t get all the way there, and we want to say that plainly rather than round it down. Marshmallow — even a sugar-free one — isn’t purely sweetener; it’s a whipped structure of gelatin and bulking carbohydrates that carries some calories of its own, sugar or not. At 26 calories per serving, this is genuinely lower than the Standard syrup’s 51, but it’s a meaningfully bigger number than the 1-9 calories our Sugar-Free Vanilla, Mocha, and Caramel syrups land at. If near-zero calories specifically is the goal, this is the one tier-swap on the site where “sugar-free” and “basically calorie-free” don’t mean quite the same thing.

Where to Find Sugar-Free Marshmallows

These aren’t on every grocery shelf the way granulated allulose or monk fruit is — look in the diabetic-friendly or keto section of a larger grocery store, or order online. Formulations vary by brand more than most sugar-free products do, so check the ingredient label for allulose, erythritol, or a similar sweetener rather than assuming any “sugar-free” marshmallow bag is built the same way.

The Syrup

Broil the sugar-free marshmallows on a parchment-lined sheet, checking at the 90-second mark since they can scorch a bit faster than regular marshmallows. Scrape them into a saucepan with 1/2 cup water and melt over medium-low heat, 3-5 minutes — give it a little longer than the Standard recipe if it’s not fully smooth yet. Off the heat, stir in vanilla and salt, then cool completely.

This batch (8 servings)$3.55 total

Per 2 tbsp serving~$0.44

Assumptions: sugar-free marshmallows at typical specialty/diabetic-aisle pricing (roughly $7/8oz bag, using about half) and Costco-size pure vanilla extract. This is the most expensive of the site’s sugar-free syrups — sugar-free marshmallows are a genuinely niche product, priced accordingly.

Storage & Shelf Life

• Keeps about 2 weeks in a sealed jar in the fridge.
• Firms up slightly, same as the Standard version — a warm water bath loosens it back up.
• Double the batch if you go through it quickly — everything scales evenly.

Swaps & Notes

• Why not just use allulose syrup with marshmallow extract? Marshmallow extract isn’t a common, clearly-labeled grocery product the way vanilla or almond extract is — most bottles sold as “marshmallow flavor” are actually vanilla-forward blends. Real (sugar-free) marshmallows, toasted, get a genuinely marshmallow-and-char flavor that a bottled extract can’t reliably match.
• Prefer near-zero calories over the real marshmallow flavor? The Sugar-Free Vanilla Syrup is a reasonable stand-in flavor-wise (both read as sweet-and-warm), at a fraction of the calories.

What to Make With This

2 tbsp of this syrup, mixed into cold brew with a light sweet cream blend, is our Sugar-Free Toasted Marshmallow Cream Cold Brew. If calories aren’t your main concern, the Toasted Marshmallow Syrup uses regular marshmallows, or the Maple Toasted Marshmallow Syrup behind our Ingredient-Honest tier skips marshmallows entirely.

Recipe Card Summary

Sugar-Free Toasted Marshmallow Syrup

• 3 cups sugar-free marshmallows, broiled and melted with 1/2 cup water, vanilla, salt
• Makes ~8 servings (2 tbsp each) · Prep: 5 min · Total: 15 min (mostly broiling + cooling)
• Cost: ~$3.55/batch, ~$0.44/serving

FAQ

Is this actually sugar-free, or just lower-sugar?

Genuinely sugar-free if the marshmallow brand you use is — allulose and erythritol aren’t sugar. But it’s not calorie-free; see the honest note above.

Why does this cost more than the site’s other sugar-free syrups?

Sugar-free marshmallows are a specialty product with a smaller retail footprint than granulated sugar-free sweeteners, so they carry a higher per-ounce price.

Do sugar-free marshmallows broil and melt the same as regular ones?

Close, but not identical — they can scorch a little faster under the broiler and take slightly longer to melt fully smooth. Both are accounted for in the steps above.