How to Make Seaweed Soap

Made with natural ingredients, seaweed soap has moisturizing and exfoliating properties. The easiest way to make your own is by using the melt-and-pour method. Use the finished product yourself, or wrap it up and give some as a gift.

Things You'll Need

  • Melt-and-pour soap base

  • Knife

  • Stove

  • Cooking pot

  • Water

  • Heat-proof mixing bowl

  • Spoon

  • 2 sheets crumbled nori (seaweed)

  • Soap molds

  • Airtight container or paper to wrap soap

Step 1

Cut your soap base into blocks. Soap base is a pre-made soap ready for additives such as fragrance, color or herbs. The base may already be perforated to show you where and how to cut your blocks.

Step 2

Fashion a double boiler by adding water to a cooking pot and bringing it to a boil. Place a heat-safe mixing bowl over the boiling water. This is a gentle way to melt your soap base without drying it out or burning it.

Step 3

Add the soap base blocks to the mixing bowl portion of your double boiler, stirring often until the base is melted.

Step 4

Mix two sheets of crumbled nori (the seaweed used to make sushi) into the soap base. The nori is dry and very easy to crumble using only your hands.

Step 5

Remove the soap from the stove, allowing it to cool slightly ( two to three minutes).

Step 6

Carefully pour the soap into soap molds and allow it to harden. The soap should harden in about two hours.

Step 7

Remove the soap from the mold, and store in a cool, dry, airtight container (sandwich bag or wrapped in paper).


Soap base made with seaweed extracts is available for purchase in soap-making supply shops or online. This adds extra seaweed to your soap.

You can add essential oils after removed the soap from heat for fragrance and skin-enhancing benefits. Try mixing in a drop or two of eucalyptus oil or tea tree oil.

References & Resources