Best Sugar Free Chocolate Bars in the UK: 2026 Guide

Ours, if you want to skip the label reading:

On this page: how to pick · what to check on the pack · sugar free or no added sugar · which Diablo bar · the figures · what else is on the shelf · FAQ

How to pick the best sugar free chocolate bar

Three decisions cover it. The first is the claim on the front, because sugar free and no added sugar are defined differently in US food law and describe different things, which the next two sections unpack. The second is the sweetener, since maltitol, erythritol, steviol glycosides and sucralose each bring a different sweetness, texture and calorie count to the bar, and the ingredients list names the one in your hand. The third is the cocoa level: a milk bar sweetened with maltitol will carry a few grams of sugars from its milk powder while a dark bar carries almost none, and the darker the bar the lower the sugars figure tends to run.

Diablo builds every bar on maltitol, a polyol made from starch that behaves like sugar in the recipe, so the chocolate tempers, snaps and melts the way you expect. Five of the 75 g bars add steviol glycosides at 0.02 percent alongside the maltitol. Polyols follow the recipe: 80 percent cocoa leaves little room for anything else, so the 80% dark shows 20 g per 100 g against 42 g in the 85 g dark.

What should you check before you buy a bar?

Sugar free or no added sugar: what is the difference?

In the US both terms are defined by the FDA in 21 CFR 101.60. Sugar free means less than 0.5 g of sugars per serving with no sugar ingredient, and unless the food is low or reduced calorie the claim must carry a statement such as "not a low calorie food". No added sugar means no sugars or sugar containing ingredients such as honey or juice concentrate were added in processing, and it says nothing about the sugars figure itself. Polyols are not sugars under either definition, which is how a maltitol bar can read sweet with a low sugars line. In GB, the home market for these bars, the nutrition and health claims register sets sugar free at 0.5 g per 100 g or under.

Every Diablo bar in this guide is sweetened with maltitol in place of sugar. On the dark bars the sugars figure runs from 0.5 g to 2 g per 100 g and comes from the cocoa; on the milk and white bars it runs from 6.3 g to 10 g and comes from the lactose in the milk powder. The table further down prints each one. For the full explainer, read sugar free vs no added sugar.

Which Diablo bar suits which taste?

How do the Diablo bars compare on paper?

Every figure is per 100 g from the product's own panel. Every bar here is sweetened with maltitol, and its sugars come from the cocoa, the milk powder, the nuts or the fruit.

Not a low calorie food. See nutrition information for sugar and calorie content.

Two patterns stand out. The dark bars sit at 2 g of sugars per 100 g or under. The milk and white bars sit between 6 g and 10 g, because milk powder brings lactose with it whatever the sweetener. And polyols follow the cocoa level, not the sweetener blend: 20 g in the 80% dark against 42 g in the 85 g dark, while the milk bars with steviol glycosides carry 44 g to 46 g. Every product page prints the full panel, including saturated fat and salt, so the comparison can be taken further from there. Maltitol itself is covered in what is maltitol.

What else is on the shelf?

A fair roundup names the other bars on the shelf, and since this is the UK guide the seven below are UK shelf bars, with each figure taken per 100 g from that brand's own product page as read on 29 September 2026. For the bars sold in the US, see our US guide. These rows are published facts and nothing more: no scores, no prices and no links, because the point is to show how different recipes reach a low sugars figure, not to rank them.

The table shows the two routes to a low sugars figure. One replaces the sugar with a polyol, a stevia blend or both. That is the route Diablo, Torras, Frankonia and the 25 g bar all take, and it keeps a familiar level of sweetness with the polyols showing on their own line. The other pushes cocoa so high that there is almost no room left for anything sweet. That is how a 99 percent or 100 percent bar reaches 1 g or under with nothing sweet in the recipe at all. A 90 percent bar sits between the two: sugar is still an ingredient, and the panel shows 7 g per 100 g.

Frequently Asked Questions

Which sugar free chocolate bar has the lowest sugars figure?

Of the ten Diablo bars here the lowest is the Dark Chocolate 85 g at 0.5 g of sugars per 100 g, from the cocoa, with 42 g of polyols and 8.1 g of fiber on the same panel. The Dark Chocolate and Hazelnuts 85 g follows at 1 g.

Is sugar free chocolate really free of sugar?

Almost. In the US the sugar free claim is allowed under 0.5 g of sugars per serving, so a trace can remain. Polyols such as maltitol are not sugars and are printed on their own line, which is why the bar still tastes sweet.

Does sugar free chocolate affect blood glucose?

It depends on the sweetener. Maltitol is absorbed more slowly than sugar, and the GB nutrition and health claims register carries an authorized claim that consumption of foods/drinks containing maltitol instead of sugar induces a lower blood glucose rise after their consumption compared to sugar-containing foods/drinks. That is a statement about the ingredient, not a promise about any bar.

How much sugar free chocolate is comfortable in one sitting?

Polyols are absorbed slowly, which is the reason for the lower glucose rise, and every pack over 10 percent polyols says that excessive consumption may produce laxative effects. A few pieces at a time is the comfortable pattern, and a bar keeps well in a cool cupboard for the next evening.

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