Prices updated daily — 21 July 2026
Product type overview
instant mashed potato sits within Tinned Foods, part of Breakfast & Pantry. On this page you compare 19 products from 9 UK supermarkets: Aldi, ASDA, Co-op, Iceland, Morrisons, Ocado, Sainsbury's, Tesco and Waitrose. The lowest unit price for instant mashed potato is £5.94/kg at ASDA. In total, 2 variants of instant mashed potato are compared (different pack sizes and compositions). All prices are normalised to the same unit (per kilogram, per litre or per piece) so that packs of different sizes can be compared fairly — a larger pack is not automatically the best value. The ranking below shows, per variant, which supermarket currently has the sharpest price, including own-label products alongside national brands. Prices refresh daily from the retailers' own public price lists, so you never see stale offers when planning your weekly shop. Allsupers uses no affiliate links or paid placement; the ranking is purely price-based and updated from public data.
Cheapest instant mashed potato
Compare 19 products across 9 supermarkets
instant mashed potato — compare prices across 9 supermarkets
ASDA
ASDA Classic Instant Mash Potato 180g
180 g
£5.94/kg
at 1 supermarket
TESCO
Tesco Instant Mashed Potato 160G
160 g
£6.25/kg
at 1 supermarket
Morrisons
Morrisons Instant Mash Classic
160 g
£6.25/kg
at 1 supermarket
Sainsbury's
Sainsbury's Instant Mashed Potato 2 x 80g
160 g
£6.25/kg
at 1 supermarket
Batchelors
Batchelors Smash The Original Instant Dried Mashed Potato Powder 176g
176 g
£8.52/kg
at 1 supermarket
Morrisons
Morrisons Instant Mash Onion 180g
160 g
£8.75/kg
at 1 supermarket
Morrisons
Morrisons Instant Mash Cheese And Onion
160 g
£8.75/kg
at 1 supermarket
ASDA
ASDA ASDA Cheese & Onion Instant Mash Potato 100g
100 g
£8.80/kg
at 1 supermarket
Batchelors
Batchelors Smash The Original Instant Mashed Potato 360g
360 g
£10.83/kg
at 4 supermarkets
Idahoan
Idahoan Perfect Mash Cheddar Cheese Flavoured 109g
109 g
£11.47/kg
at 7 supermarkets
Idahoan
Idahoan Perfect Mash Buttery 109g
109 g
£11.47/kg
at 6 supermarkets
Idahoan
Idahoan Perfect Mash Butter & Herb Flavoured 109g
109 g
£11.47/kg
at 4 supermarkets
Idahoan
Idahoan Perfect Roasted Garlic Mash Potato
109 g
£11.47/kg
at 2 supermarkets
Idahoan
Idahoan Perfect Cheese & Bacon Mash Potato
109 g
£11.47/kg
at 1 supermarket
Idahoan
Idahoan Perfect Mash Buttery 183g
183 g
£11.91/kg
at 3 supermarkets
Smash
Batchelors Smash Original Instant Mashed Potato
176 g
£12.50/kg
at 1 supermarket
Idahoan
Idahoan Perfect Buttery Mash Potato
109 g
£16.51/kg
at 1 supermarket
Idahoan
Idahoan Perfect Mash Bubble & Squeak Snack Pot 55g
55 g
£18.18/kg
at 3 supermarkets
Idahoan
Idahoan Perfect Mash Bacon & Cheese Snack Pot 55g
55 g
£18.18/kg
at 2 supermarkets