Ice lollies are one of the best frozen treats when you're watching your weight. Unlike ice cream bars, many lollies are surprisingly low in calories — some as low as 22 calories. But with dozens of options on UK supermarket shelves, it's hard to know which ones are actually worth it.
This guide ranks the lowest calorie ice lollies available in UK supermarkets in 2026, with Slimming World syns and Weight Watchers points included so you can enjoy a frozen treat without blowing your daily allowance.
| Ice Lolly | Calories | SW Syns (approx) | WW Points (approx) |
|---|---|---|---|
| Walls Rocket | 22 kcal | 1 | 1 |
| Walls Mini Milk | 28 kcal | 1.5 | 1 |
| Rowntree's Watermelon Lolly | 52 kcal | 2.5 | 2 |
| Walls FAB | 61 kcal | 3 | 2 |
| Walls Twister | 73 kcal | 3.5 | 3 |
| Rowntree's Fruit Pastille Lolly | 74 kcal | 3.5 | 3 |
| Walls Calippo Orange | 81 kcal | 4 | 3 |
| Solero Berry | 83 kcal | 4 | 3 |
| Solero Exotic | 90 kcal | 4.5 | 4 |
Calorie figures are per lolly. Always check current packaging as recipes change. SW syn values are approximate (based on 20 kcal = 1 syn); always verify in the official SW app. WW points are approximate SmartPoints.
The Rocket is a British classic and the lowest calorie branded ice lolly you'll find in UK supermarkets. At just 22 calories, it's made with raspberry, orange, and lime layers and contains no artificial colours. That works out to roughly 1 Slimming World syn and 1 WW SmartPoint.
You'll find Rockets in virtually every major supermarket — Tesco, Sainsbury's, Asda, Morrisons, and Waitrose — usually in packs of 8. They're a staple in every Slimming World freezer for good reason.
Mini Milks are tiny milk ice lollies in strawberry, chocolate, and vanilla flavours. Despite their creamy base, they come in at just 28 calories per lolly — approximately 1.5 syns on Slimming World. They're great if you want something a little creamier without going over your syn allowance.
Rowntree's fruit lollies are popular for a reason. The Watermelon variety is one of the lightest at around 52 calories, making it roughly 2.5 syns. It's refreshing, naturally flavoured, and widely available in multipack boxes during summer months.
The FAB is an iconic British treat — a strawberry lolly with a vanilla ice cream centre and chocolate chip topping. Walls reformulated FAB to bring calories down, and it now sits at approximately 61 calories — around 3 syns. Considering it's got three layers of flavour and texture, it's genuinely good value for the calorie spend.
The Twister combines vanilla ice cream with a tropical passion fruit and pineapple layer at 73 calories. It's more filling than a pure fruit lolly, which makes the 3.5 syns feel worth it. A solid choice when you want something more substantial.
If you love Fruit Pastilles, the lolly version is a brilliant option at 74 calories. It delivers the same bold fruit flavours in a refreshing frozen format at approximately 3.5 syns. These tend to sell out fast in summer — worth keeping a stash in the freezer.
The Calippo is a sorbet-style lolly in a push-up carton. The orange flavour comes in at 81 calories and has a satisfying, intensely fruity taste. At around 4 syns, it's a reasonable choice — particularly good for really hot days when you want something substantial.
Solero lollies pair vanilla ice cream with a real fruit coating. The Berry variety is around 83 calories and the Exotic (mango and passion fruit) is approximately 90 calories. Both are around 4–4.5 syns. They're more filling than pure fruit lollies and worth the slightly higher calorie count if you want something creamy.
The lowest calorie lollies share a few things in common:
Lollies with a dairy base (ice cream centre) or a chocolate coating will always be higher in calories. That said, a Twister at 73 calories is still dramatically lower than a Magnum Classic at around 260 calories.
Yes — most fruit-based ice lollies fit comfortably into your daily 15-syn allowance. The Rocket (1 syn) and Mini Milk (1.5 syns) are the go-to choices for Slimming World members wanting a virtually guilt-free frozen treat. Even a Solero at 4.5 syns leaves plenty of budget for the rest of the day.
For more low syn frozen and cold drink options, see our complete low syn drinks guide.
The Walls Rocket lolly is one of the lowest calorie ice lollies in UK supermarkets at just 22 calories per lolly. The Walls Mini Milk is close behind at 28 calories.
Generally yes — by a significant margin. Fruit-based ice lollies are typically 20–90 calories, while a standard ice cream bar is 150–300+ calories. The difference is mainly fat content: fruit lollies have very little fat, while ice cream is high in cream and sugar.
A Walls Rocket lolly is approximately 1 syn on Slimming World, based on its 22-calorie content. Always verify the current syn value in the official Slimming World app, as values can change when recipes are updated.
Absolutely. Ice lollies like the Rocket and Mini Milk are one of the most diet-friendly frozen treats available. At 22–28 calories, they satisfy a sweet craving without a significant calorie impact. Even the higher-calorie options like Solero (90 cal) are a fraction of most desserts.
Yes. Most major supermarkets stock own-brand sugar-free or "no added sugar" ice lollies that can be as low as 8–15 calories. Tesco, Asda, and Aldi all carry these in their own-brand ranges, usually in multipacks. They use sweeteners instead of sugar.
The Solero Berry is the lowest calorie Solero variety at approximately 83 calories, compared to the Solero Exotic at around 90 calories. Both are a reasonable treat option at under 100 calories.
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