Lump of Coal Soap Recipe

Want to have some fun this Christmas? Surprise someone with some coal in their stocking! We did this once already with coal bath bombs, but now we have a coal soap recipe too! The soap recipe is so easy to do. If you found the bath bomb a little too challenging, you need to give the soap a try. Plus, this recipe works as a fantastic blacksmith soap to help clean up greasy, dirty hands. Perfect for the blacksmith (or Forged in Fire fan), in your life!

Lump of coal soaps in a bucket

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As you all know, in our other life we are blacksmiths. So jokes around being naughty to get coal at Christmas are a favourite around here. Earlier we made a coal bath bomb and it was so much fun we decided we needed a soap soap version too!

Lump of coal in the stocking for those on the naughty list

The best part about making soaps is how darn easy it is! Since I have the kids involved we use melt and pour soap bases to make it safe and easy for the kids to create amazing soaps. All you need is a microwave and the right mold and you can make the most creative soaps, like these lumps of coal soaps!

Why Blacksmith Lump of Coal Soaps?

So in addition to the obvious relationship between coal and blacksmithing, there is another reason this soap is so great for blacksmiths. It is a powerful cleaning soap that helps get rid of all that ground in dirt and grease from working the forge all day. Now you may not be forging, but I am sure there are times when you need a good strong soap that won’t strip your hands and damage your skin. Activated charcoal is fantastic for doing exactly that. That’s why we like to call these Blacksmith Soaps in addition to Lumps of Coal.

Black lump of coal soap recipe

Lump of Coal Soap Recipe Ingredients

1/2 pound clear melt and pour soap cut into cubes
10-20 drops each of frankincense and myrrh essential oil. As an alternative I find sweet orange and clove or rosemary a wonderful blend for these soaps.
Activated charcoal powder
Black Biodegradeable Glitter*
Coal mold
Spray bottle of rubbing alcohol
Medium sized microwave safe bowl or measuring cup

*A NOTE ON GLITTER – Glitter has become very controversial due to the negative impacts on the environment, but I know many of you still love a little sparkle in your projects! When it comes to glitter, I believe it is always optional. None of my projects require it. But if you decide you do want a little sparkle and shine in your creations, I highly recommend using a biodegradeable glitter. There are lots of fantastic options available.

Clear Glycerin Soap Base- 2lbActivated Charcoal Teeth Whitening Powder - 4oz Natural Whitener Plaque Remover Sensitive Tooth Bad Breath Brush Gums Toothpaste Face Wash Skin Cream Treatment Wow Blanqueador De DientesLumps of Coal/Gemstones Soap & Candle MoldMinke Biodegradable Glitter (Multi Color Combo)


lump of coal soap diy project

Coal Soap Making Instructions

This recipe will make approximately 8 to 10 soaps.

To start, you will need to cut up your melt and pour soap. Some soaps come with marks indicating where to cut, some don’t. If you don’t have lines aim for about a 1 inch by 1 inch cube, approximately 1 ounce each. It doesn’t need to be exact. The nice thing about making this soap is that it is so forgiving.

Add 10 cubes of the soap base to a microwave safe bowl or measuring cup. Melt in 30 second intervals, stirring after each until it is completely melted.

Add frankincense and myrrh essential oils, 1 teaspoon of activated charcoal powder and the glitter to the bowl. Be cautious with the activated charcoal. It likes to become airborne. So if you have little ones helping, you might want to do that step and start the mixing so you don’t end up with charcoal everywhere.

Mix all the ingredients together until thoroughly incorporated.

Now it’s time to prep the molds. Spray the bottom of the molds with rubbing alcohol. Then carefully pour the soap mixture into the molds. Spray the top of the soap to prevent bubbles from forming.

Leave it to harden for at least 2-4 hours. Make sure there are no ripples when you blow on it. I like to leave it overnight to be extra safe.

Once you are sure it is set, carefully pop the soaps from the mold. Store the soaps in an airtight container until ready to use.

You can drop these “as is” into your stockings as a funny coal in the stocking surprise, or wrap them in a bit of cotton or parchment paper and tie it with a ribbon.

Enjoy the coal in the stocking this Christmas!

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Lump of Coal Soaps

A quick and easy recipe to create lumps of coal soaps for the stockings.

Time 30 minutes
Setting time 4 hours
Total Time 4 hours 30 minutes
Servings 8


  • 1/2 lb Clear melt and pour soap
  • 10-20 drops preferred essential oil
  • 1 tsp activated charcoal powder
  • 1 tsp biodegradeable cosmetic glitter optional
  • Spray bottle with rubbing alcohol


  1. Cut the soap into 1 inch cubes. You need 10 cubes. Place in microwave safe measuring cup.

  2. Melt the soap cubes in the microwave in 30 sec increments, stirring well between intervals.

  3. Add essential oils, glitter and activated charcoal.

  4. Mix completely.

  5. Set your silicone mold somewhere safe where it will not be disturbed. Spray the molds with rubbing alcohol.

  6. Carefully pour the mix into the mold cavities. Spray the top of the soap with rubbing alcohol.

  7. Let harden for 2 to 4 hours. Ensure the soaps are hard before removing form the molds.