Quaker Oats vs Ready Brek on Slimming World
When it comes to breakfast on Slimming World, oats are the undisputed champion — filling, fibre-rich, and completely Free when eaten as a Healthy Extra B. But not all oats are equal, and the Quaker Oats versus Ready Brek debate comes up time and time again in group. Both are oat-based, both count as a HexB, and both make a warm, comforting bowl of porridge on a cold morning. So what actually separates them?
The biggest practical difference is the portion size you get for your HexB allowance. Quaker Oats gives you a generous 40g portion as your HexB, while Ready Brek's HexB serving is 28g — nearly 30% less. That extra 12g of oats makes a noticeable difference to how full your bowl looks and feels, especially if you're someone who eats with their eyes as much as their stomach.
Quaker Oats are rolled oats, so they have a heartier, chewier texture. Ready Brek is milled into a fine powder, giving it that smooth, creamy consistency that kids (and plenty of adults) love. Neither is objectively better — it's a texture preference. But from a pure Slimming World value perspective, getting more food for the same syn spend is always a win.
In this comparison I'll break down the HexB portions, calories, protein, fibre, prep time, flavour variety, and texture so you can make the right choice for your morning routine.
Head-to-head breakdown
| Category | Quaker Oats | Ready Brek | Winner |
|---|---|---|---|
| HexB portion size | 40g | 28g | Quaker Oats |
| Syns if you go over HexB | ~2 syns per extra 10g | ~2.5 syns per extra 10g | Quaker Oats |
| Calories per HexB serving | ~152 kcal (40g) | ~107 kcal (28g) | Ready Brek |
| Protein per HexB serving | ~5g | ~3.5g | Quaker Oats |
| Fibre per HexB serving | ~4.5g | ~2.8g | Quaker Oats |
| Texture | Hearty, chewy, textured | Smooth, creamy, fine | Tie |
| Prep time | 3–5 minutes (hob or microwave) | 2–3 minutes (microwave) | Ready Brek |
| Flavour variety | Plain plus flavoured sachets (synned) | Original and chocolate flavour | Quaker Oats |
The verdict
On Slimming World, Quaker Oats is the stronger choice. You get a 40g HexB serving versus Ready Brek's 28g, which means more volume, more fibre, and more staying power for the same syn cost.
At 40g, Quaker Oats delivers around 5g of fibre and 5g of protein — figures that help you stay full through to lunch. Ready Brek is not a bad option, particularly if you prefer a smooth texture or are making porridge for young children, but gram for gram, Quaker Oats offers better value within the HexB allowance.
If you regularly exceed the HexB portion and syn the extra, Quaker Oats' lower syn-per-gram cost also works in its favour.
Frequently asked questions
Is Ready Brek a HexB on Slimming World?
Yes, Ready Brek does count as a Healthy Extra B on Slimming World, but the portion is smaller than you might expect. The HexB allowance for Ready Brek is 28g, which is noticeably less than the 40g allowed for Quaker Oats. Both give you the HexB calcium and fibre benefits, but if volume of food matters to you at breakfast, Quaker Oats offers a bigger bowl for the same syn-free allowance. Always double-check current HexB values on the official Slimming World app, as portions can occasionally be updated.
Which is lower calorie, Quaker Oats or Ready Brek?
On a per-HexB-serving basis, Ready Brek comes in lower at around 107 calories for its 28g serving, compared to Quaker Oats at around 152 calories for the 40g portion. However, on a per-100g basis both oats are roughly similar in calories — around 370–380 kcal per 100g — because they're essentially the same ingredient processed differently. If you're prioritising the lowest-calorie breakfast, Ready Brek's smaller HexB portion technically wins, but Quaker Oats gives you more food for a very modest calorie increase.
Can I mix Quaker Oats and Ready Brek together?
Yes, you can absolutely mix the two, and many Slimming World members do exactly this to get a texture that's somewhere between smooth and chunky. If you combine them, just make sure your total mixed portion stays within your HexB allowance. A useful approach is to weigh 20g of Quaker Oats and 14g of Ready Brek, which together come to roughly a combined HexB equivalent. Adding Ready Brek to rolled oats also helps thicken the porridge and gives it a creamier finish without needing to add milk beyond your HexA allowance.
Which oats are better for weight loss on Slimming World?
Both are excellent choices for weight loss on the plan because oats are high in beta-glucan fibre, which slows digestion and keeps you full for longer — reducing the likelihood of snacking before lunch. Between the two, Quaker Oats edges ahead for weight loss because the larger 40g HexB portion provides more fibre and more protein, both of which support satiety. Ready Brek can also work well, especially if you prefer a smooth texture, but the smaller portion means you may feel hungrier sooner. Whichever you choose, topping with syn-free fruit helps bulk out the bowl further.
More comparisons
Newsletter
Kitchen-tested, inbox-ready.
One weekly email with new syn values, recipes, and honest food reviews. No spam, unsubscribe any time.
Syn values based on publicly available nutritional data. Always confirm with the official Slimming World app. Updated 2026-04-27.