How Many Syns In OXO Roast Potatoes? Find Out Here!

Updated on 
27 May, 2022

Our Ultimate Guide To Making SW OXO Roast Potatoes 

If you're new to the slimming world and you're looking for some slimming world roast potato recipes, you’ve probably come across the infamous SW OXO roast potatoes.

SW OXO roast potatoes are made with OXO stock which allows the potatoes to crisp up on the outside the way they would with olive oil or fat while avoiding the high syns that come with normal roast potatoes. 

How Many Syns In OXO Roast Potatoes?

In our small guide below, we will discuss what makes OXO roast potatoes so great for the slimming world, some tips for making these roasties and our best recipe for OXO SW roast potatoes. 

Why Are OXO Roast Potatoes So Famous On The Slimming World Plan?

The recipe for OXO roast potatoes is very well known for slimming worlders, this is because as we mentioned above it allows the potatoes to get that nice golden crispy outside without any oil or fat needed and most of all, the recipe is SYN FREE! 

Thanks to the stock that cooks with these potatoes it also seasons the outside without any extra ingredients while keeping the potatoes moist on the inside due to the liquid. 

Are Potatoes Syn Free On Slimming World?

Potatoes in any form, boiled or mashed are syn free on slimming world, but the syns come when potatoes are fried or cooked in oil, which is why roast potatoes have syns on slimming world since they are often cooked in fat. 

For example, the average goose fat roast potato has 4 syns in for a small potato making it very high in syns.

Tips For Making SW OXO Roast Potatoes 

Making some slimming world OXO roast potatoes is much easier than you think, but there are some tips and tricks to getting the best results while cooking this meal.

How Many Syns In OXO Roast Potatoes?
  • Don’t use your best baking tray - Since this method involves evaporating stock in your baking tray we would avoid using your best baking tray due to the risk of burnt bits sticking to your pan. Make sure whatever pan you use is non-stick too.
  • Let the stock evaporate - Even if you have to cook your roasties for longer, allow the stock to evaporate in the pan so that the outside of the potatoes has a chance to crisp up properly.
  • Don’t skip par-boiling - Par-boiling these OXO potatoes is very important and is what keeps them fluffy on the inside. 
  • Use the right kind of potato - Use the best type of potato for roasting such as King Edwards or Maris pipers.
  • Add herbs - Some fresh herbs like thyme and rosemary can add even more flavour to your OXO potatoes when sprinkled on top before baking.

Our SW Recipe For Making OXO Roast Potatoes 

Now we know all about OXO roast potatoes and why they are amazing, let’s get into the most important part, how to make these roasties. 

We’ve listed our best simple to follow recipe down below.


  • 10 white potatoes, King Edwards, Maris Pipers or any potato best for roasting. 
  • Two chicken or beef OXO stock cubes. 
  • Low cal cooking spray.


  1. While chopping your potatoes into halves or quarters depending on their size, preheat your oven to around 200 degrees. 
  2. Par-boil your potatoes in some boiling water for about 5 minutes, drain then shake them up in the pan to get the fluffy sides. 
  3. Toss the potatoes into a baking tray, make up your OXO stock cubes then pour over 300ml of the stock to partially submerge the potatoes. 
  4. Spray the potatoes then pop them in the oven to roast for 40 minutes to an hour until crispy and cooked.

Final Words

Overall, SW OXO roast potatoes are the perfect syn free alternative to your standard roast potatoes cooked in fat and high syn oil, with the average goose fat potato having 5 syns!

How Many Syns In OXO Roast Potatoes?

You can use both chicken and beef OXO cubes depending on the meat you're using and never forget to parboil your potatoes first to get them soft and crispy on the outside!

Jennifer is a certified nutritionist and weight loss coach with a Master's in Nutrition from Cambridge. With over 10 years experience, she shares healthy recipes and science-backed slimming tips on SheCooksSheEats to help people reach their wellness goals. Jennifer stays up-to-date by regularly attending conferences and continuing her nutrition education. She aims to provide research-backed advice to inspire balanced, happy living.
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