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Syns & Slimming World

How Many Syns in Croissant?

By Jenny Updated

Croissants are one of those breakfast pastries that look innocent enough sitting in a basket, but on Slimming World they pack a substantial syn punch that catches a lot of members out. The reason is simple: a traditional croissant is made by laminating dough with layer upon layer of butter, folding and rolling until you achieve that signature flaky, honeycomb interior. All that butter does not come free, and a single plain all-butter croissant from a supermarket typically clocks in at around 9 syns, which is more than half of most members' daily allowance in one go.

Unlike a slice of wholemeal bread, which can be used as a Healthy Extra B, croissants offer no Healthy Extra status whatsoever. They are not classed as a free food, and there is no clever way to make them fit the plan without paying the syn cost. Even the smaller mini croissants you find in multipacks will still set you back roughly 4 to 5 syns each, which is hardly a bargain when you consider how quickly they disappear.

That said, croissants absolutely can have a place in a balanced Slimming World week if you plan for them. A leisurely Saturday brunch with a single butter croissant, a poached egg, smoked salmon, and a generous side of tomatoes and mushrooms turns 9 syns into a meal that genuinely feels indulgent. Splitting one with a partner halves the damage, and pairing it with Mullerlight yoghurt and fresh berries keeps the rest of the plate Free.

If you find yourself reaching for pastries often, it is worth exploring lower-syn swaps such as a wholemeal bagel thin spread with quark and jam, or a Warburtons Thin used as the base for a breakfast sandwich. Croissants remain a treat best enjoyed occasionally rather than as a weekday staple.

Per serving

Croissant — syn values

Portion Syns kcal
1 mini croissant (25g) 4 103
1 plain croissant (57g) 9 234
1 large all-butter croissant (70g) 11 287
1 chocolate-filled croissant (75g) 14 290
1 almond croissant (90g) 19 390
Half a plain croissant (28g) 4.5 115
Syn values are based on Slimming World 2026 guidance. Always double-check with your group or app.

Numbers at a glance

Quick auto-calculated stats for Croissant.

16.0syns / 100g
Syns per 100g
useful for comparing brands
27%
of a 15-syn day
based on standard daily allowance
26kcal / syn
calories per syn
the lower, the more 'value' your syns get
6
portion sizes covered
from snack to full serving
4syns
cheapest portionat 1 mini croissant (25g)
smallest serving

Brand breakdown

Popular supermarket and branded products, with the portion-level syn count.

Brand Product Portion Syns kcal
Tesco All Butter Croissant 1 croissant (50g) 9 215
Sainsbury's Taste the Difference All Butter Croissant 1 croissant (60g) 11 272
Asda Extra Special All Butter Croissant 1 croissant (57g) 9 234
M&S All Butter Croissant 1 croissant (65g) 12 290
Waitrose All Butter Croissant 1 croissant (60g) 10 255
Aldi Specially Selected All Butter Croissant 1 croissant (55g) 9 230
Lidl Deluxe All Butter Croissant 1 croissant (55g) 9 225
Co-op Irresistible All Butter Croissants 1 croissant (60g) 11 265

Lower-syn alternatives

Swaps that keep the feel of the original without the syn hit.

Wholemeal toast (HExB)

Free as HExB

Two slices of wholemeal bread used as your Healthy Extra B give you a Free breakfast base, saving you the full 9 syns a croissant would cost. Top with scrambled eggs, grilled tomatoes and mushrooms for a filling breakfast that keeps your syns intact for later.

Warburtons Thin

3 syns each

A Warburtons Thin is about 3 syns compared to 9 for a croissant, saving you 6 syns. Fill it with bacon medallions, egg and ketchup for a breakfast sandwich that feels indulgent but costs a fraction of the pastry option.

FAQs

How many syns in a croissant?

A standard plain croissant is around 9 syns, while a large all-butter version climbs to about 11 syns. Mini croissants are roughly 4 syns each. A chocolate-filled croissant is about 14 syns and an almond croissant can reach 19 syns. Splitting a plain one in half gives you 4.5 syns.

Is a croissant free on Slimming World?

No, croissants are not free and cannot be used as a Healthy Extra. The laminated butter dough makes them calorie-dense at around 9 syns for a standard plain croissant. They sit firmly in the treat category and need to be planned into your daily syns allowance.

Can you have a croissant on Slimming World?

Yes, as a planned treat. At 9 syns for a plain croissant, it takes a sizeable chunk of your daily allowance, but paired with Free foods like poached eggs, smoked salmon and roasted tomatoes, it becomes a satisfying brunch. Splitting one with a partner at 4.5 syns each makes it even more manageable.

What is a lower syn alternative to a croissant?

A Warburtons Thin at around 3 syns or a bagel thin at about 4.5 syns gives you a bread-based breakfast option for half the syn cost of a croissant at 9 syns. Wholemeal toast used as your Healthy Extra B is Free. None have the flaky texture, but they satisfy the bread craving for far fewer syns.

Lower-syn bread alternatives

Food Portion Syns vs current
Cornflour 1 tbsp (8g) 1.5 −2.5 syns
Plain Flour 1 tbsp (15g) 2.5 −1.5 syns
Breadcrumbs 1 tbsp (15g) 3 −1 syns
Crumpet 1 crumpet (40g) 3.5 −0.5 syns
Corn Tortilla 1 small corn tortilla (30g) 3.5 −0.5 syns

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