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Making Sea Salt

One of our new ice creams for our new flavour array is sea salt ice cream, and I got to wondering how it would taste with salt made from our local Dingle sea water. So, the other day I decided to make salt.

It started with a trip to the beach, which is never a bad thing, especially on a sunny day. I took along the partner and the little one, and we made an afternoon of it.

Róisín is a bit too young to be interested in the science part of making salt, but she sure loved the fresh air and looking at the waves.

I’m thinking kids a bit older would enjoy such a project and would be quite amazed to see solid white crystals appearing out of a clear liquid, though they would need a bit of patience. If you want to try it, here’s what I did.

How to Make Sea Salt

1. I started with 5 litres of Dingle sea water (note – make sure the area where you get your water is clean and free from pollution).

2. I passed the water through a coffee filter to make sure there was no sand or tiny bits of seaweed.

3. I boiled the water in a large pot until the salt had begun to crystalise and there was about an inch of liquid left (you might need to scrape the bottom of the pot now and then as the salt begins to form). This takes several hours and produces a lot of steam!

4. I turned off the heat and left it uncovered to evaporate overnight. I don’t know if this is necessary, but I didn’t want to burn the salt by mistake.

5. In the morning, the water was gone, but the salt was still moist. I spread it on a baking tray and put it in the oven at 100C for an hour, at which point the salt was dry.

6. That’s it! The yield was about 200 grams of Dingle sea salt (photo top)!

The salt has quite an interesting flavour – more delicate than I would have thought. You can taste the mineral content, and it oddly has a hint of sweetness. Now, I’ll have to turn it into ice cream!

P.S. I was just informed by a science teacher that if you dangle a string into the boiling seawater, once it’s reduced a bit, maybe attached to a rod that can sit on the pot and with a weight tied on the end in the water, that the salt crystals grow on the string. That might have more dramatic effect if you’re making it with kids. I’ll try it next time.

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10 Responses to “Making Sea Salt”

  1. February 21st, 2010 at 5:32 pm

    Nastassia(LetMeEatCake) says:

    What an interesting flavor for ice cream, i would have never thought of that combo. A trip to the beach and homemade sea salt sounds like a lovely day.

  2. February 21st, 2010 at 5:48 pm

    Dianne says:

    This is just brilliant! I’ve always wondered how sea salt was made. Makes me wish I was close to the ocean.

  3. February 22nd, 2010 at 11:30 am

    Lilly Higgins says:

    This looks great, A brilliant idea, and Roisin is gorgeous! Congratulations on the mention in The Sunday Times yesterday!

  4. February 22nd, 2010 at 1:20 pm

    dee says:

    brilliant and cheaper than getting it in the shops!

  5. February 22nd, 2010 at 6:40 pm

    Kieran says:


  6. March 6th, 2010 at 7:20 pm

    Sea Salt Ice Cream says:

    [...] I made my own sea salt. If you’re near the sea and have the inclination, here’s how I did it. [...]

  7. March 6th, 2010 at 11:42 pm

    Science Friday: Futurefood, websites as music, ridiculous robots, and the spirituality-surgery link « Ian There says:

    [...] could always come to a Make night with at the Science Gallery, or check out how to make Irish sea salt (via Ice Cream Ireland), or become a ham radio goddess. Possibly related posts: (automatically [...]

  8. July 3rd, 2010 at 10:45 am

    Ice Cream Ireland » Blog Archive » Sweet Taste of the Sea says:

    [...] wrote this for today’s Irish Times magazine, with the sea salt and sea salt ice cream recipes: WHEN IT COMES to summer, at least in memory, the days are sunny, [...]

  9. July 14th, 2010 at 2:57 am

    My Flower Delivery .ie says:

    That is bloody brilliant, I will definitely give this a try so.

    Thanks for sharing,

  10. July 27th, 2010 at 10:55 pm

    Erin says:

    I am glad I found your blog! I love Dingle and I love ice cream. I just moved to the redwood coast of California where we have beautiful black sand (stone) beaches that remind me so much or Ireland. I am definitely making my own sea salt and sea salt ice cream. Thanks!

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Kieran Murphy is a director of Murphys Ice Cream living in Dingle, Co. Kerry, Ireland.

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Murphys Ice Cream

Murphys Ice Cream has shops in Dingle, Killarney and Dublin 2 (Wicklow Street).