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How to Prepare Sea Moss

Sea Moss is a seaweed often used as a thickening agent in puddings, beverages, ice cream and more when animals products can’t be used, or in a raw food diet.

Thick Irish Moss gel in a bowl and small jar on a black table with a wooden spoon beside it. In the background is a jar of thinner consistency Irish Moss.

Sea Moss is a seaweed considered to have numerous health benefits and sometimes is called a superfood. It’s thought to be healing to the digestive tract, used in weight loss programs and a source of many nutrients, however there aren’t many studies to confirm all of the benefits.

It’s an ingredient that I’m familiar with as it is often used in the Caribbean, but it wasn’t until a few years ago that I tried preparing it myself. I was wandering through a local market in Trinidad and walked away with a package of dried Sea Moss and dried hibiscus.

What is Sea Moss and Irish Moss?

Sometimes the names sea moss and Irish moss are used interchangeably, and while they both are seaweed there are differences.

  • Irish Moss (chondrus crispus) is a seaweed that grows in colder waters around Europe, North America, and Canada.
  • Sea Moss grows in warmer waters around Asia, South America and the Caribbean.
  • Irish Moss tends to have flat leaves while Sea Moss (gracilaria) tends to have thicker, branch-like sections.
  • The nutrient composition in Irish Moss and Sea Moss can differ based on the species of algae and the waters it is grown in.

A number of years back carrageenan, which is derived from Irish Moss, came under fire in a study that claims carrageenan can cause gastro-intenstinal distress and inflammation. After some research I’ve made the choice to continue to consume sea moss, but it’s up to you to decide for yourself.

Where to buy Sea Moss

You’ll often find dried sea moss in Caribbean or Asian markets, and in some health food stores. It might not look super appealing in it’s natural state and smells a bit (okay, a lot!) like the sea. Never fear, it will all work out and your end product will not taste like ocean water.

When you buy sea moss it will be dried, covered in salt and sometimes have bits of darker seaweed attached to it or some sand. Don’t forget, this is a natural ingredient that comes from the ocean and there will be variations from batch to batch.

How to Make Raw Sea Moss Gel

Time needed: 13 hours

There are 2 ways to prepare the sea moss gel. It can be boiled to quickly soften the moss and make the gel, or it can be soaked overnight. I’m sharing the overnight soak method for a raw end product. Both methods work and it’s your preference how you prepare it.

  1. Rinse

    Take a small amount of sea moss (1 – 2 oz) out of package and give it a good rinse once or twice to get some of the salt and sand off.Rinsed Irish Moss on a baking tray.

  2. Soak

    Put it into a large bowl filled with cool water. It doesn’t look like a lot but this stuff really expands so make sure to use a bowl large enough for the seaweed to double in size and still be submerged in water.A close up of dried Irish Moss soaking in a bowl of water

  3. Rehydrate

    Cover and leave overnight in the water to rehydrate. A close up of soaked Irish Moss in a bowl of water

  4. Rinse Again

    Remove the sea moss from the bowl and dump out the water. You may see some sand at the bottom of the bowl that has come off as the sea moss rehydrates. Give it another good rinse, making sure to get rid of any salt and sand that may have settled on the bottom of the bowl.

  5. Blend

    Put the moss into a blender with a bit of fresh water and blend. It takes a bit of time to break down and the amount of water used depends on how thick you want the end product. Add more water as needed to get to the desired consistency, keeping in mind that the gel will thicken up a bit as it sits.

    If you have high-powered blender this step will go faster, but any blender will work. Blend in batches and go slow. The gel gets quite thick and can give your blender quite a workout!
    Irish Moss gel in a NutriBullet blender A close up of Irish Moss gel in a blender.

  6. Store in the refrigerator

    Pour it into an airtight jar and store in the refrigerator for up to a week.A close up of a small jar of Irish Moss Gel on a black table. A small bowl of gel and wooden spoon in the background.

How to Use Sea Moss Gel

You can use this gel to thicken puddings and desserts, smoothies and other beverages. If you are avoiding animal products, following a vegan diet or a raw diet this is often used as an alternative to gelatin.

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  1. I use Irish Moss and ginger as an expectorant when I’m catching cold.

    Using 750ml of bottled water, I soak 14g of well dried Irish Moss for 24 hours. Using a thumbfull quantity of freshly chopped ginger, I make a cup (250ml) of tea and let it soak overnight in the refrigerator alongside the Irish Moss. I blend the two together, including the fragments of ginger, and simmer for 30 minutes before pouring the concoction into a wide mouth ball jar. I refrigerate after cooled and use approx 250ml at a time to make a smoothie of my choice. Whatever chest congestion I’d been feeling is usually long gone before the liter of elixir is.

    1. Thanks for sharing Eric. I haven’t used Irish Moss in this way, but it’s always great to find new ways of using such a great ingredient!

  2. Lovely explanation Heme. Thank-you.

    Do you know if Irish moss in its congealed form can be successfully frozen for a period of time?

    Tina Marie

    1. Hi Tina Marie:

      I have not tried it myself but from my understanding it can be frozen. I hope that helps!

  3. I have a dry mucus’s cough that keeps me up at night can Irish Sea moss help me to get this mucus out and can I get it in a pill form if their is such thing

    1. Hi Pat: Thanks for reaching out. This is something that you should talk to your health care provider about as there could be many reasons for the cough. I have seen Irish Moss in pill form, but I have not tried any of them. Good luck!

    1. Hi Bryan:

      It’s best added to a drink or smoothie. It’s pretty thick and doesn’t have much taste on its own. Keep in mind that because it is thick, it will thicken up any drink that you may add it to. Good luck!

    1. Hi Reese: I got some Irish Moss when I was in Trinidad and have also purchased locally in a Caribbean market (I’m in Toronto). You can often find it in health food stores but I find that to be a bit more expensive.

    1. Hi Daphne: Sea moss has become popular recently and it’s more readily available in stores and online. I usually buy it in a local store instead of online so I’m not certain which online sellers have a good quality product. You can check Amazon for some brands and reviews as a starting point. Good luck!

  4. I’ve been using Irish Moss for years as part of my training regimen. It’s great for recovery and helps maintain my performance. I prefer the sea moss variation for its thicker consistency, which makes it perfect for my smoothies. Whenever I’m short on time, I take a sea moss supplement, and it works really well for me.

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