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Syns & Slimming World

How Many Syns in Snack-a-Jacks?

By Jenny Updated

Snack-a-Jacks have been a fixture in the Slimming World snacking conversation for decades, and for good reason. These puffed rice cakes from Quaker offer a satisfying crunch at a fraction of the syns you'd spend on a standard bag of crisps, which is why so many members keep a multipack in the cupboard for emergencies. They're not free, but they slot neatly into a day when you've got a few syns spare and you fancy something salty, sweet or savoury rather than reaching for fruit again.

The range covers several flavours, including salt and vinegar, sour cream and chive, cheese, barbecue and the indulgent sweet caramel. Most savoury bags sit around 4 to 4.5 syns, while the sweet caramel variety tips up to around 5 syns per bag, thanks to the added sugar coating. The plain unflavoured rice cakes are slightly lower again and are useful if you want to keep syns down or pair them with a free-food topping like cottage cheese, light Philadelphia or sliced tomato with black pepper.

The portion control is what makes them genuinely useful on plan. Each bag is single-serve, so you're not faced with the open-packet temptation that comes with a sharing bag of crisps. They're also light enough that you can pop one in a lunchbox or handbag without it turning into a crushed mess by mid-afternoon. They won't fill you up the way a Speed-packed salad or a jacket potato will, but they do scratch the crunchy-snack itch.

A word of caution: because they're low in calories per bag, it's tempting to think of them as a free pass, but those syns add up if you reach for two or three across the day. Used sensibly as a planned treat, though, they're one of the easier branded snacks to fit into your daily syns allowance.

Per serving

Snack-a-Jacks — syn values

Portion Syns kcal
1 bag sweet caramel (25g) 5 95
1 bag salt and vinegar (22g) 4.5 85
1 bag sour cream and chive (22g) 4.5 86
1 bag cheese (22g) 4.5 87
1 bag barbecue (22g) 4.5 85
1 bag plain rice cakes (22g) 4 82
Half bag salt and vinegar (11g) 2 43
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 Snack-a-Jacks.

20.0syns / 100g
Syns per 100g
useful for comparing brands
33%
of a 15-syn day
based on standard daily allowance
19kcal / syn
calories per syn
the lower, the more 'value' your syns get
7
portion sizes covered
from snack to full serving
2syns
cheapest portionat Half bag salt and vinegar (11g)
smallest serving

Brand breakdown

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

Brand Product Portion Syns kcal
Quaker Snack-a-Jacks Salt & Vinegar 1 bag (22g) 4.5 85
Quaker Snack-a-Jacks Sweet Caramel 1 bag (25g) 5 95
Quaker Snack-a-Jacks Sour Cream & Chive 1 bag (22g) 4.5 86
Quaker Snack-a-Jacks Cheese 1 bag (22g) 4.5 87
Quaker Snack-a-Jacks Barbecue 1 bag (22g) 4.5 85
Quaker Snack-a-Jacks Jumbo Rice Cakes Salted 1 cake (10g) 2 38
Quaker Snack-a-Jacks Big Bag Cheese 1 bag (30g) 6 118

Lower-syn snack alternatives

Food Portion Syns vs current
Plain Rice Cakes 1 plain rice cake (7g) 1 −1 syns

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