Did you know that rubies and sapphires are the same mineral? They are varieties of corundum, just with different trace elements in their crystal structures. When I was splitting this soap batter to make pink rose and purple lavender, I felt like I was splitting corundum into rubies and sapphires, though of course I can’t do that! Anyways, without any more mineral thoughts, this is my favorite tallow soap recipe and it can easily be customized to any scent or color that you would like.
Below, I made a pink French clay-colored, rose-scented variation and an alkanet-colored, lavender-scented one too. The rose version of this soap is my favorite bar I have ever made. I make it on repeat and use it for body & facial wash in the shower everyday. I made some for two of my dear friends and they have both been sending very positive feedback. One said she is using it for her hair as well and just requested a restock. ♡
To customize, follow the recipe all the way until you bring the soap to trace, then you add one ounce of choice essential oil, one teaspoon of kaolin clay, and one to two teaspoon(s) of choice colorant. Some of my future plans are to make a nettle-colored, fir-scented version, and maybe a charcoal-colored, patchouli-scented one too. These are my husband’s favorite add-ins! (Hm, and maybe cedarwood & rosemary, and carrot & frankincense, and a woad-colored eucalyptus & clary sage. There are many future variations to be made!)
I decorated these bars with lavender sprigs and rose buds, but you can of course omit those if you feel they are a hassle. I hope you love this recipe as much as I do, please let me know if you come up with any winning combinations!

Lye Safety
Lye is caustic before it reacts with oils and requires some safety precautions:
- Wear PPE! Goggles, long gloves are essential. You could also wear a mask
- Mix your lye with water in a well-ventilated area, or outside.
- Always add lye to water, not water to lye!
- Keep kids and pets away while working with lye
- Use heat-safe, non-reactive containers (stainless steel, heavy plastic). Avoid aluminum.
- If lye or lye solution touches skin, immediately wash with cold water!
- Thoroughly clean area after using lye.


My Favorite Tallow Soap Base: Rose and Lavender Variations
Ingredients
Equipment
Method
- Gather up your ingredients and equipment!
- Put on your Safety Gear for working with lye: lye is caustic before it reacts with oils and requires some safety precautions, please read those from above! Put on your PPE (goggles, long gloves, mask) and remove anyone who could be injured by the lye (kids, pets, etc).
- Make your Lye Solution: First, weigh your water in a large enough bowl to stir your lye. Weigh your lye into the water. Slow down towards the end (gram-by-gram measurement) to make sure you don't exceed the weight of lye needed!Stir in a well-ventilated place, or outside. The fuming should finish within a minute or two, and the lye will dissolve.
- Weigh your solid oils (tallow, coconut oil) into a pot. Melt them together, heating just enough to melt. Your melted oils will be significantly hotter than your lye solution, measure your liquid oils (olive oil, avocado oil) in a separate bowl and then combine with your melted solid oils.
- Simultaneously cool down your lye and oils to 110℉-120℉.While these are cooling, measure your choice of essential oil (and clay/root pigment, if using) in a small bowl.
- Once the lye and oils have cooled to about 110℉-120℉, pour the lye solution into your melted oils and stir together.I like to stir the mixture with my immersion blender stick and burp out the air from the cavity before turning on the blender. Blend for one minute, going in a big circle, and then take a minute break. Continue until the batter has a pudding-like consistency and leaves a trail behind the blender.Ladle a cup or so of soap batter into a small bowl and thoroughly mix with your essential oil mixture, trying to beat out any clumps before transferring this back to the larger batter. Stir until homogenous.
- Pour your soap mixture into molds or a loaf mold. Place your decorations on top as desired.
- Finally, thoroughly clean up your workspace before allowing your kids and animals to return!I like to wash everything by hand and then put it all in the dishwasher and run that too. I also like to wash the counter after making soap to make sure I clean up any hiding lye crystals.
- Cure: After 24 hours (or 48 if they seem a little soft), pop your soaps out of their molds. If you made a loaf, this is the time to slice it up! Line up your soaps on a baking tray that you won't need for awhile, or some other surface that works for you. These need to have airflow for 4-6 weeks so that they can fully cure. During this time, the oils and lye are fully saponifying.









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