By Declan Hallwood, Nutrition & Supplements Editor · Updated 26 June 2026
We may earn a commission from qualifying purchases made through links on this page, at no extra cost to you. This never affects our ratings.
The Trek Cocoa Oat Protein Flapjack is a plant-based snack bar with 9g of protein per bar, wrapped in a chewy oaty flapjack that tastes far more like a treat than a health food. Below we cover the taste and texture, what Trek actually put in it, and whether it's still worth buying at today's price. The short version: the bar is as good as ever, but the price on this particular box has gone the wrong way.
Trek is one of the UK's better-known makers of nutritional snacks, specialising in protein-rich, plant-based food. Their flapjack range is vegan friendly and gluten free, which makes it a rare thing: a protein snack that works for gluten-sensitive vegans and coeliacs alike.
Stock check: price has jumped since we first covered this
We check availability and pricing against Amazon's own catalogue. As of July 2026 the Cocoa Oat 16-bar box is still buyable, but only from a third-party seller at around £39.99 (roughly £2.50 a bar) rather than the £16.80 it used to sell for, and stock is into the last few units. Other flavours in the same Trek flapjack range, such as Salted Caramel and Peanut Butter, are sold by Amazon itself at around a third of that price. The bar is still good. This box is no longer the bargain it was, so buy accordingly.
| Pack size | 16 bars, 50g each (0.8kg) |
|---|---|
| Protein | 9g per bar (Trek's figure) |
| Fibre | A source of fibre, from the oats |
| Dietary | Plant-based, vegan friendly, gluten free |
| Price at the time of writing | £39.99 for the 16-bar box |
The flavour is exactly what you'd hope for, flapjack-y and chocolatey, and the consistent theme across owner reviews is that the cocoa and oat combination works. It's possibly a touch sweet for certain tastes, but it's not an overpowering sweetness.
The bars are chewy without being crumbly, with a moist texture and a balanced flavour. You'd swear they'd slipped some gluten in there to get them this chewy, but no, Trek's flapjacks are gluten free, which is what makes them a genuinely useful option for gluten-sensitive vegans and coeliacs.
They're moreish
These are very easy to keep reaching for, and they are a calorie-dense snack rather than a diet bar. Take one or two with you and leave the rest in the cupboard, so the box isn't staring at you all day.
They work well as a rushed-morning breakfast or a pre-session top-up, which is the job most people seem to buy them for.
Trek list 9g of plant-based protein per 50g bar, and the bars are a source of fibre thanks to the oat base. That protein figure is decent for a flapjack: it won't rival a dedicated protein bar, but it's a real contribution from a whole-food-ish snack rather than a chalky isolate.
Beyond that, treat these as an energy-dense snack. The oats, syrup and chocolate topping that make them taste good also make them a meaningful chunk of calories, so a second bar is not a free hit. Trek quote the full breakdown of energy, fat, carbohydrate and salt on the pack itself, and that panel is the number to trust, so check it if you're tracking macros closely.
For context on where a flapjack fits in a day's eating, the NHS Eatwell Guide is a sensible reference point: bars like this are a convenience, not a foundation.
This is the part that has changed, and not in a good way. The Cocoa Oat 16-bar box used to sell at around £16.80, roughly £1 per flapjack, which made it an easy value pick. At the time of writing it's listed at £39.99, about £2.50 a bar, and it's being sold by a third-party seller rather than by Amazon, with stock down to the last handful of boxes. That reads like a discontinued flavour being cleared rather than a normal price.
At that price it's hard to call it good value, because the same Trek flapjack range in other flavours (Salted Caramel and Peanut Butter, among others) is sold by Amazon itself at roughly a third of the cost per bar. If you specifically want Cocoa Oat, this is currently the way to get it. If you mainly want a Trek flapjack, another flavour will do the same job for a lot less.
For more options, see our roundup of the best vegan protein bars in the UK, and more shakes, bars and snacks in our nutrition section.
Check price on AmazonTrek list 9g of plant-based protein per 50g bar, giving you a useful boost for a pre- or post-workout snack from a plant-based source.
It's plant-based and vegan friendly, and Trek's flapjack range is gluten free, which suits gluten-sensitive vegans and coeliacs. Check the pack you buy, as Trek list the dietary info per product.
Not at the moment. The Cocoa Oat 16-bar box has drifted up to around £40 on Amazon UK, roughly £2.50 a bar, because stock is thin and it's being sold by a third party rather than Amazon. Other flavours in the same Trek range sell for around a third of that, so the bar is still good but this particular box is not the bargain it once was.
The best whey protein isolate powders in the UK for 2026, including which works best as a whey protein for women. We compare protein per scoop, price per kilo, lactose and taste across five isolates.
An honest C4 pre workout review for the UK: 150mg caffeine, beta-alanine tingles, 1g creatine nitrate, flavours, how to take it, and whether Cellucor C4 Original is worth the money.
The best omega 3 supplements in the UK for 2026, compared on EPA and DHA per serving rather than headline mg. Fish oil, cod liver oil capsules and vegan algae picks.
The best tart cherry juice in the UK for 2026, from Montmorency concentrates to ready-to-drink and capsules. Honest picks for muscle recovery and sleep, with the evidence and the cautions.
Best Exercise is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk. As an Amazon Associate we earn from qualifying purchases. This comes at no extra cost to you and never influences our independent reviews or rankings.