Archive for the ‘vegetables’ Category

I have today been experimenting in making mash potatoes in a thermal cooker.

I have often cooked potatoes my thermal cooker (normally in the top pot) but have found that they tend to become a bit watery due to the extended cooking time.

Bearing this in mind I decided to try cooking them in a roasting bag  and found that even after cooking them for 4 hours they turned out great when mashed with some butter and a little milk.



  • 900kg floury potatoes such as King Edwards, Maris Piper or
  • 4 tbsp butter
  • 3 tbsp hot milk
  • salt and pepper

You will also need a roasting bag which are available from supermarkets. Do not use a plastic bag as they are not suitable for cooking in.


  1. Peel the potatoes and cut them into similar size pieces.
  2. Put the potatoes into a roasting bag, remove as much air as possible and seal with the tags supplied with the bags.
  3. Place the bag into the inner pot and fill the pot with water. The potatoes in the bag will float but as long as the lid will go on that will be fine.
  4. Bring to the boil and then turn down to a simmer.
  5. Put the lid on and simmer for 3 minutes.
  6. Place the inner pot into the insulated outer pot and shut the lid.
  7. Leave to thermal cook without power for at least 1 hour.
  8. Carefully remove the roasting bag from the inner pot. Use something to protect your hand as it will be hot.
  9. Empty the potatoes into a bowl and mash until smooth.
  10. Add the butter and continue to mash until it is all mixed in.
  11. Add the milk (it is better hot because the potatoes will absorb it more quickly).
  12. Season with salt and pepper and serve great mashed potatoes.

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