β Accessories
Best Sugar-Free Coffee Syrups UK 2026: 8 Compared
Sugar-free coffee syrup used to mean a thin, chemical-tasting compromise. That changed. The current crop from Monin, Torani and Jordan's Skinny uses sucralose and acesulfame K blends that hold up in hot coffee without the metallic aftertaste, and the flavour ranges now cover everything a cafe menu does. We bought and tasted eight zero-calorie bottles back to back in plain espresso, hot lattes and iced coffees to find the ones worth the shelf space.
Key Takeaways
- The Monin Vanilla Sugar Free 1L is the best all-rounder - natural-tasting vanilla with a thick body that most rivals can't match.
- For value, the Torani Sugar Free Vanilla 750ml gives you more syrup per pound than anything else we compared.
- Caramel done right: Monin Caramel Sugar Free 1L has the warm, toasted edge real caramel needs.
- The best-known skinny bottle, Jordan's Skinny Salted Caramel, is zero calories, zero carbs and genuinely good in a latte.
- Want the sweetener-free route? Monin Salted Caramel No Added Sugar leans on the salt instead of the sugar.
Suggested reading: Best Coffee Syrups UK 2026 (full-sugar) Β· How to Use Coffee Syrups: Ratios & Tips Β· Best Summer Coffee Drinks
Sugar-free coffee syrup used to be the option you settled for, not the one you chose. The old bottles were thin, chemical and left a bitter note that ruined the coffee they were meant to improve. The new generation changed the maths: heat-stable sweetener blends, natural flavourings and bottles that cost the same as the sugary versions. For anyone counting calories, cutting sugar, or doing keto, they close the gap to a cafe drink with none of the sugar hit.
We compared eight bottles from the three brands that dominate UK shelves - Monin, Torani and Jordan's Skinny - in plain espresso, hot lattes, iced coffees and espresso tonics. Each syrup went through the same protocol: sweetness intensity, flavour accuracy, how it behaves in hot versus cold drinks, and value per 10ml pump. Here are the results.
Quick Picks
Monin Premium Vanilla Sugar Free 1L
Torani Sugar Free Vanilla 750ml
Monin Premium Caramel Sugar Free 1L
Jordan's Skinny Syrup Salted Caramel 750ml
Torani French Vanilla Sugar Free 750ml
Monin Salted Caramel No Added Sugar 1L
Jordan's Skinny Syrup Mocha 750ml
Jordan's Skinny Syrup Vanilla 750ml
Quick Comparison
| Product | Price | Rating | Size | Sweetener | Best For |
|---|---|---|---|---|---|
| Monin Premium Vanilla Sugar Free 1L | ~Β£11.55 | 4.6/5 | 1L | sucralose blend | The natural-tasting daily vanilla |
| Torani Sugar Free Vanilla 750ml | ~Β£9 | 4.5/5 | 750ml | sucralose blend | The budget bottle that outperforms its price |
| Monin Premium Caramel Sugar Free 1L | ~Β£13 | 4.6/5 | 1L | sucralose blend | The caramel that doesn't taste diet |
| Jordan's Skinny Syrup Salted Caramel 750ml | ~Β£9.99 | 4.6/5 | 750ml | sucralose blend | The UK's best-known skinny syrup |
| Torani French Vanilla Sugar Free 750ml | ~Β£9 | 4.7/5 | 750ml | sucralose blend | The dessert-flavoured option |
| Monin Salted Caramel No Added Sugar 1L | ~Β£12.49 | 4.5/5 | 1L | sucralose + acesulfame K | The caramel for people avoiding sweeteners |
| Jordan's Skinny Syrup Mocha 750ml | ~Β£13 | 4.5/5 | 750ml | sucralose blend | The chocolate fix without the sugar |
| Jordan's Skinny Syrup Vanilla 750ml | ~Β£13 | 4.4/5 | 750ml | sucralose blend | The straight vanilla if you want the whole range |
In-Depth Reviews
1. Monin Premium Vanilla Sugar Free 1L
~Β£11.55 | 1L, sucralose + acesulfame K, 100% natural flavours
Monin is the brand you find in most UK coffee shops, and this sugar-free version is the one that convinced us the category works. The vanilla is clean and round rather than sharp, which is the biggest tell of a cheap artificial syrup. It uses natural flavouring plus a sucralose and acesulfame K blend, so you get the sweetness without the sugar and none of the bitter linger that plagues older diet syrups.
In hot coffee it behaves like the full-sugar bottle. One pump in a 200ml latte reads as genuinely sweet, and because the syrup base is thicker than most sugar-free rivals, the drink keeps some body rather than turning watery. It also mixes cleanly into iced coffee with no clumping at the bottom of the glass.
""I've tried every sugar-free vanilla on the market and this is the only one that doesn't taste like a diet drink," one UK reviewer notes. "My whole family uses it and nobody notices the difference.""
- Natural-tasting vanilla
- Thick body, not watery
- 1L bottle lasts months
- Pricier per litre than Torani
- No pump included
- Sucralose aftertaste if you use 3+ pumps
2. Torani Sugar Free Vanilla 750ml
~Β£9 | 750ml, zero calories, cane-sugar-free, vegan
Torani is Monin's main rival in the UK, and the sugar-free vanilla is where its value argument lands hardest. At roughly Β£9 for 750ml you get a third more syrup per pound than Monin, which matters if you drink a flavoured coffee every day. The flavour is slightly thinner and sweeter than Monin's, but it is clean, consistent and never cloying.
The bottle shape matters more than it should: the narrow neck fits the standard barista syrup pumps, and the cap is easy to control when you are pouring straight into a cup. Zero calories per serving checks out, and the ingredient list is short - water, flavourings and sweeteners, nothing you need to squint at.
""I go through a bottle every six weeks and the price is why I keep coming back," says one long-term buyer. "Tastes as good as the cafe syrups to me.""
- Best price per litre
- Fits standard syrup pumps
- Clean, simple flavour
- Thinner mouthfeel than Monin
- Sweetness is a touch artificial
- 750ml bottle not as tall as some
3. Monin Premium Caramel Sugar Free 1L
~Β£13 | 1L, sucralose + acesulfame K, natural caramel flavouring
Caramel is the hardest flavour to do sugar-free, because the buttery, toasty notes in the real thing come from cooked sugar. Monin's version gets impressively close using natural caramel flavouring and the same sweetener pair as its vanilla. It has the warm, slightly burnt edge that makes caramel syrup work in a latte, rather than the flat candy taste of cheaper bottles.
It excels in iced drinks. The syrup dissolves instantly in cold milk, and the caramel holds its flavour where some sugar-free syrups fade as the ice melts. In a hot flat white it adds sweetness and aroma without tipping into dessert territory, which makes it the bottle we reach for when a mocha feels too heavy.
""Bought this after the cafe ran out of syrup and I needed a fix," An Amazon reviewer says. "It's dangerously close to the real Monin caramel.""
- Genuine caramel depth
- Works hot and iced
- Natural flavouring base
- Same price premium as vanilla
- No pump in the box
- Caramel flavour fades after 6 months
4. Jordan's Skinny Syrup Salted Caramel 750ml
~Β£9.99 | 750ml, zero calories, zero sugar, zero carbs, keto-friendly
Jordan's Skinny built its name on these 750ml bottles, and the salted caramel is the flagship for a reason. The sucralose and acesulfame K blend is well balanced, with none of the bitter linger that cheap skinny syrups leave behind, and the salted caramel profile is rich enough to work in both hot lattes and cold brew.
What sets Jordan's apart is the range and the consistency. There are over 20 flavours, and they all share the same sweetener base, so once you find a flavour you like the rest of the family behaves predictably. The bottles also ship with a sports-cap style top that pours cleanly, which beats fumbling with a separate pump.
""I've lost two stone and this is the only thing that made giving up sugar in coffee painless," writes one UK customer. "The salted caramel one is genuinely good.""
- Zero calories and zero carbs
- Huge flavour range
- Easy-pour cap included
- Thinner than full-sugar syrups
- Salted note is subtle in hot drinks
- Not as natural-tasting as Monin
5. Torani French Vanilla Sugar Free 750ml
~Β£9 | 750ml, zero calorie, French vanilla flavouring
French vanilla is vanilla with the volume turned up - creamier, rounder and slightly custard-like. Torani's sugar-free version captures that better than anything else we compared, which makes it the pick if your coffee tastes more like a dessert than a drink. It pairs brilliantly with oat milk, where the extra creaminess from the milk and the syrup stack into something close to a frappe base.
At the same Β£9 price point as the regular Torani vanilla, it costs nothing extra to upgrade the flavour. The trade-off is that the French vanilla profile is a bit much in black coffee - this is a milk-drink syrup through and through, and it shines in iced lattes where the cold flattens the sweetness.
""This is the closest thing to a Starbucks vanilla syrup I've found that's sugar free," an Amazon reviewer reports. "I use it in iced lattes every single day.""
- Richer, custard-like vanilla
- Great with oat milk
- Same price as regular vanilla
- Too sweet for black coffee
- Not a subtle flavour
- Sweetener aftertaste in hot drinks
6. Monin Salted Caramel No Added Sugar 1L
~Β£12.49 | 1L, no added sugar, natural flavours and colourings
Monin's No Added Sugar range is a different proposition from the sugar-free bottles: it sweetens with a gentler blend and leans on the flavour itself to carry the drink. The salted caramel here is the standout - the salt cuts through and makes the caramel taste more like food and less like confectionery. If you find sucralose syrups too sweet, this is the bottle to try.
It is the best mixer of the group in espresso tonics, where the salt and the bitter tonic play off each other. It also degrades more gracefully in hot drinks - the caramel stays round where some sugar-free syrups go sharp above 80 degrees.
""The salt really comes through and it makes the coffee taste expensive," one UK buyer says. "I keep a bottle at work and at home now.""
- Salt cuts the sweetness
- Excellent in espresso tonics
- No added sugar claim verified
- Priciest bottle here
- Less sweet than sugar-free rivals
- Flavour is polarising
7. Jordan's Skinny Syrup Mocha 750ml
~Β£13 | 750ml, zero calorie, chocolate mocha flavouring
Chocolate is the flavour most sugar-free syrups get wrong - it comes out thin and artificial. Jordan's mocha gets the balance right: dark chocolate up front, coffee undertone behind it, and a sweetness level that lets the cocoa through instead of drowning it. In a hot mocha with oat milk it genuinely stands in for the real thing.
It also works cold, which most chocolate syrups don't. Mixed into iced coffee with a splash of milk it tastes like a coffee-shop iced mocha rather than a chocolate milkshake with caffeine, and the zero-calorie claim means you can have two without the maths hurting.
""I was sceptical about a sugar-free mocha syrup but this is now a permanent part of my coffee drawer," notes an Amazon reviewer. "Better than the sugary ones I used to buy.""
- Dark chocolate flavour, not milky
- Works hot and iced
- Zero calories per serving
- Chocolate note can dominate
- Needs a strong coffee base
- Not for plain black coffee
8. Jordan's Skinny Syrup Vanilla 750ml
~Β£13 | 750ml, zero calories, zero sugar, vegan
This is the vanilla that anchors the Jordan's Skinny range, and it is the one to buy if you plan to collect several flavours. It is cleaner and less sweet than the salted caramel, closer to a straight vanilla extract profile, which makes it the most flexible bottle in the lineup - coffee, protein shakes, porridge and baking all take it well.
Compared with Monin's sugar-free vanilla it is a touch thinner and the sweetness is a little more upfront, but at this price with this range behind it, it is the sensible first purchase for anyone starting a sugar-free syrup collection.
""Bought this to try the brand, ended up with six flavours," one customer laughs. "The vanilla is the one I finish first.""
- Clean, flexible vanilla
- Part of a huge flavour range
- Good value with multi-buy
- Thinner body than Monin
- Sweetness is upfront
- Cap can drip if stored sideways
How to Choose a Sugar-Free Coffee Syrup
Check the sweetener. The current best-in-class use sucralose with acesulfame K. That pair is heat-stable, so it holds up in a 90-degree espresso without turning bitter, and it doesn't leave the metallic linger that saccharin and aspartame syrups do. If you see "contains aspartame" on the label, keep looking.
Decide between sugar-free and no added sugar. They're different products. Sugar-free means sweetened with intense sweeteners to mimic the full-sugar sweetness. No added sugar means the sweetness comes from the flavourings themselves or a gentler blend, so the bottle is usually less sweet and more natural-tasting. The Monin Salted Caramel No Added Sugar is the best example of the second camp.
Match the syrup to the drink. Thin, clean syrups like Torani's vanilla suit iced drinks where heavy sweetness turns cloying. Thicker bottles like Monin's add body that holds up in hot lattes with milk. If you drink mostly black coffee, skip dessert flavours and start with a straight vanilla - it adds aroma without fighting the coffee.
Price per litre, not price per bottle. The 750ml bottles look cheaper at the shelf, but a 1L Monin works out within pence per pump of a 750ml Jordan's. For daily use, work out cost per 10ml pump before you commit.
Size matters for storage. A 1L bottle lasts a heavy daily user about three months. If you're trying flavours for the first time, buy a 750ml or the gift sets we compared rather than committing to a litre of something you might not love.
Frequently Asked Questions
Final Verdict
Sugar-free coffee syrup has genuinely caught up. If you drink one flavoured coffee a day, switching saves you roughly 11,000 calories a year - about three pounds of body weight - without the metallic compromise that used to come with it. The category has three clear winners: Monin Vanilla Sugar Free for the best all-round taste, Torani Sugar Free Vanilla for the best value, and Jordan's Skinny Salted Caramel for a zero-calorie daily driver with a huge flavour range behind it.
Buy the 750ml bottles first if you're trying the category, then step up to 1L once you've found your flavour. For the full-sugar comparison, our best coffee syrups UK guide covers the classic range, and the syrup ratios guide tells you exactly how much to pour.
Priya Kapoor
Senior Review Editor, Coffee Nerds
Priya writes about coffee machines and brewing gear. She has hands-on experience with pour-over, espresso and immersion brewing.
Last reviewed: 2026-08-12 Β· Evidence-based review Β· Contains affiliate links