Natural Cinnamon Soap Recipe

454g / 1lb of soaping oils — makes six bars. The total weight of this soap recipe with the lye and essential oils is actually 580g. For the cinnamon essential oil, use either types as described above as per personal preference.
If you’re unsure about using cinnamon essential oil, don’t worry! You can also use a skin-safe fragrance oil blend that smells like cinnamon instead of the blend I provide. It’s not considered ‘Natural’ but may be a better option for you. Search for fragrance oils on websites in your region — I give some links to soap making suppliers over here. Bramble Berry has a few that you might want to check out if you’re in the USA.
Keyword cinnamon, soap, soap recipe
Prep Time 30 minutes
Cook Time 30 minutes
Curing time 28 days
Total Time 1 hour
Author Lovely Greens


Lye water

Solid oils

Liquid oils

Ingredients to add after Trace

Special Equipment Needed



  • I always advise to get everything prepared and measured before starting to make soap. Get your equipment set out, measure out all the ingredients -- this includes the water into the heat-proof jug, lye into a jar, solid oils into the pan, and liquid oils should be in a kitchen bowl or jug.
    You should also be wearing closed toe shoes, a long sleeve shirt, hair pulled back, and wearing eye protection and rubber/latex/vinyl gloves.

Mix the Lye Water

  • Soap making is chemistry so this step needs particular care. Making sure that you're wearing eye protection and gloves, pour the lye crystals into the water in a well ventilated place. Outdoors is best. Stir immediately and thoroughly with a stainless steel or silicone spoon until dissolved. 
    Next add the clay powder and stir again until well mixed. Allow to cool outside or place it in a basin of water to help it cool down. There will be steam and heat when you mix them together so be prepared.

Melt the Solid oils

  • Just after you mix the lye water, put the pan of oils over low heat. Stir while they’re melting to speed things up. After they’re mostly melted, take the pan off the heat and stir until the last few pieces of oil melt. When fully melted, stir in the liquid oils (but not the essential oils)

Taking the Temperature

  • The ideal temperature for this recipe is 100°F / 38°C. Using a thermometer, or better yet a digital temperature gun, take the temps of both the lye water and the pan of oils. They should be within 10 degrees of one another and around the temperature mentioned.


  • When the temperatures are just right, pour the lye water into the pan of oils through a sieve. It will catch any bits of undissolved lye or chunks of clay. Now stick blend. You're going to alternate stirring and pulsing until you reach 'Trace'. Trace is when the consistency of your soap batter is like warm drizzly custard.
    I’ve included a video at the bottom of this piece for lemongrass soap and it shows my technique for stick blending. Have a watch to see what to look for.

Essential oils & moulding

  • When you’ve hit the right consistency, add the essential oils in and stir quickly but thoroughly. It will firm up fast. Next pour the batter into the moulds, spooning it in if you need to.


  • To create the swirly pattern on the tops of your bars you’ll need a wooden skewer. Once your soap is thick enough to hold a peak you can begin working. 
    Dip it into the soap batter in one corner of the mould and move it in tight circles like you’re drawing a spring. The end of the skewer should only be just below the surface of the soap. Finish at the other side and then repeat the pattern, but in reverse, all the way back.
    Sprinkle your soap with a touch of cinnamon (optional) and leave it in the mould for 48 hours. After that point saponification is complete and you can pop them out. Let the soap dry out for four weeks before using. This process is called ‘Curing’ and I have a great piece on what to do over here.
    If you’d like to give your soap as gifts, I also have some ideas on how to naturally wrap soap for gifts.