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Syns & Slimming World

How Many Syns in Fish Cakes?

By Jenny Updated

Fish cakes are one of those nostalgic British teatime staples that feel comforting and quick, but they can be a surprisingly tricky proposition on Slimming World. The issue is rarely the fish itself — white fish like cod, haddock and pollock are Free Foods, and even oilier options like salmon are nutritionally generous despite carrying a small syn value for the oil content. The trouble lies in everything wrapped around the fish: breadcrumb coatings, batter, added butter, cream, mayonnaise binders and the sunflower oil that shop-bought versions are typically fried in before freezing. A single standard frozen fish cake from the supermarket freezer aisle will usually clock in around 6 to 8 syns, and the chunkier premium versions from M&S, Waitrose or Young's can climb past 9 syns each — eat two with chips and you have demolished a daily allowance before you have even sat down.

The good news is that fish cakes are wildly easy to make at home in a way that fits the plan beautifully. Flake cooked white fish through fluffy mashed potato seasoned with spring onion, lemon zest, parsley, dill and a generous grind of black pepper, shape into patties, then bake on a tray lined with baking paper after a quick spritz of low-calorie cooking spray. Skip the breadcrumb coating entirely, or use a thin dusting of dried herbs and paprika for crunch and colour. Made this way, the whole fish cake stays close to Free, with only a small syn cost if you add a binding egg yolk or a scrape of mayonnaise.

Serve with a mountain of Speed vegetables — peas, samphire, wilted spinach, a heap of garden salad or roasted cherry tomatoes — and a wedge of lemon. You get the nostalgia, the crisp edges and the soft savoury middle without the breadcrumb syn tax.

Per serving

Fish Cakes — syn values

Portion Syns kcal
1 standard frozen fish cake (85g) 7 160
M&S classic fish cake (130g) 9 220
Homemade fish cake, fish and potato, no breadcrumbs (120g) 2 180
Homemade salmon fish cake, baked, no breadcrumbs (120g) 3 195
Young's Chip Shop large fish cake (110g) 11 230
Tesco breaded cod fish cake (90g) 7 165
Mini cocktail fish cake, breaded (25g) 2 48
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 Fish Cakes.

8.2syns / 100g
Syns per 100g
useful for comparing brands
47%
of a 15-syn day
based on standard daily allowance
23kcal / syn
calories per syn
the lower, the more 'value' your syns get
7
portion sizes covered
from snack to full serving
2syns
cheapest portionat Homemade fish cake, fish and potato, no breadcrumbs (120g)
smallest serving

Brand breakdown

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

Brand Product Portion Syns kcal
Young's Chip Shop Large Fish Cakes 1 cake (110g) 11 230
Young's Original 4 Cod Fish Cakes 1 cake (50g) 4 85
M&S Classic Cod Fish Cake 1 cake (130g) 9 220
Tesco 4 Breaded Cod Fish Cakes 1 cake (90g) 7 165
Sainsbury's 2 Salmon Fish Cakes 1 cake (113g) 8 195
Waitrose 2 Smoked Haddock Fish Cakes 1 cake (125g) 9 210
Birds Eye 4 Cod Fish Cakes 1 cake (50g) 4 90
Iceland 4 Breaded Fish Cakes 1 cake (47g) 3 75

Lower-syn alternatives

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

Homemade fish cakes (no breadcrumbs)

2 Syns each

Making your own with white fish, potato and herbs baked in Frylight drops the Syn count from 7-11 down to about 2 per cake. You skip the breadcrumb coating that drives up the Syns in shop-bought versions, and they freeze brilliantly for quick midweek dinners.

Baked white fish fillet

Free

A plain cod or haddock fillet baked in Frylight is Free on Slimming World. You lose the crispy coating, but pairing it with Free mashed potato and Speed veg gives you a similar plate for zero Syns instead of 7-11 Syns for a breaded fish cake.

Birds Eye or Iceland small fish cakes

3-4 Syns each

If you prefer the convenience of shop-bought, smaller fish cakes from Birds Eye (4 Syns, 50g) or Iceland (3 Syns, 47g) are significantly lower than premium or chip-shop sized versions at 9-11 Syns. Two small ones still cost less than one large one.

FAQs

How many syns in a fish cake?

A standard frozen breaded fish cake (85g) is approximately 7 Syns on Slimming World. Larger premium versions like M&S Classic Cod Fish Cakes climb to about 9 Syns each, while Young's Chip Shop large fish cakes are around 11 Syns. Homemade fish cakes made with white fish and potato, baked without breadcrumbs, can be as low as 2 Syns each, making them a much more plan-friendly option.

Are fish cakes free on Slimming World?

Shop-bought breaded fish cakes are not Free because of the breadcrumb coating, binders and oil used in manufacturing. A standard frozen one is about 7 Syns. However, homemade fish cakes made with Free white fish, mashed potato, herbs and baked in Frylight with no breadcrumb coating can come very close to Free, at around 2 Syns each depending on any added binding ingredients.

How many syns in Young's fish cakes?

Young's Chip Shop Large Fish Cakes are approximately 11 Syns each (110g), while the smaller Young's Original Cod Fish Cakes are around 4 Syns per 50g cake. The size and thickness of the breadcrumb coating make a big difference. If you enjoy Young's, the smaller 50g versions at 4 Syns are much kinder to your daily allowance.

Can you make Slimming World friendly fish cakes?

Absolutely. Flake cooked white fish through mashed potato with spring onion, lemon zest and herbs, shape into patties and bake on a tray sprayed with Frylight. Without breadcrumbs, a homemade fish cake is around 2 Syns — a huge saving compared to the 7-11 Syns a shop-bought breaded version costs. Batch-make them on a Sunday and freeze for easy midweek meals.

Lower-syn meat alternatives

Food Portion Syns vs current
Ham 1 slice wafer-thin ham (10g) FREE −2 syns
Tinned Mackerel In brine or water (100g) FREE −2 syns
Pastrami 30g (3-4 slices) 1 −1 syns
Bacon 1 back rasher grilled (35g) 1.5 −0.5 syns
Streaky Bacon 2 rashers (50g) 2 same

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