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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 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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