How Many Syns In Smash Instant Mashed Potato? Find Out Here!

Updated on 
1 February, 2023

How Many Syns In Smash? - Our Slimming World Syn Guide!

If your looking to make an easy side with your dinner, you might be tempted to make up a sachet of smash with some water, but does this instant mashed potato have syns on the slimming world plan?

Smash instant mashed potato has 5 syns for a 180g serving, making it quite high in syns, we would therefore suggest having this mashed potato in moderation. 

In our syn guide below we will take you through how much smash you can have on slimming world, some syn values of other instant mashed potatoes and how to make your own SW mashed potato at home.

How Much Smash Can I Have On Slimming World?

At 5 syns for a 180g portion, you could have up to three servings or 540g of this instant mashed potato before using all of your 15 syns for the day.

Smash used to be syn-free on the slimming world plan but due to the added ingredients and lack of nutrition/filling power it now has syns.

Syn Values Of Instant Mashed Potatoes

If you find smash to be too high in syns or you're curious about the syns in other instant mashed potatoes, we've listed some other options for you to check out down below.

Our SW Mashed Potato Recipe
  • Batchelor's Smash the Original Instant Mashed Potato 360g - 5 syns.
  • Batchelor's Smash The Original Instant Mashed Potato 176g - 3 syns for 100g.
  • Sainsbury's Instant Mashed Potato 4 x 110g (440g) - 6 syns.
  • Tesco Instant Mashed Potato 2 x 80g (160g) - 7.5 syns.
  • Tesco Stockwell Instant Mashed Potato 120g - 3.5 syns.
  • Asda Smart Price Instant Mashed Potato 120g - 3 syns.
  • The Instant Mash Co Instant Mashed Potato 3 x 100g - 3.5 syns.
  • Tesco Everyday Value Instant Mashed Potato 120g - 3.5 syns.
  • Athena Instant Mashed Potato Flakes 2 x 100g - 4.5 syns.
  • McDougalls Storeroom Instant Mashed Potato 2.25kg - 17.5 syns for 100g.

Our SW Mashed Potato Recipe

If you find instant mashed potato to be too high in syns we've got a great slimming world recipe for you to check out down below which is syn-free and super creamy!


  • 900g of potatoes. 
  • Chicken stock.
  • Eight spoons of fat-free yoghurt.
  • One egg.
  • Seasoning.


  1. Start by putting your potatoes in a pan with some chicken stock then simmer until they become soft, drain the potatoes then reserve the stock.
  2. Mash the potatoes then add the stock in bit by bit, add in the yoghurt and egg then mix and season.
Syn Values Of Instant Mashed Potatoes

Final Words

Overall, smash is quite high in syns having 5 syns for a 180g version, this means you could have up to three servings before using up all your 15 syn daily allowance. To save syns we recommend making your mashed potato at home which is syn-free for an easy side.

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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