This recipe is from The Natural Soapmaking Book for Beginnersby Kelly Cable.
Large stainless steel pot
bowls for measuring ingredients
small zip top bag
glass or plastic bowl for lye water
12 ounces tallow
8 ounces coconut oil
5 ounces olive oil
4 ounces argan oil
4 ounces mango butter
4.2 ounces lye
6 ounces water
6.5 ounces kombucha
Safety First! Remember to wear your safety equipment and mix the lye water outside.Tell everyone you live with that where you're working is off limits.Give yourself enough time to complete the recipe.
Prep Ahead: Combine water and kombucha and chill in the refrigerator.
Heat the Fats/Oils: In a large pot over medium-low heat, combine tallow, coconut oil, olive oil, argan oil, and mango butter. Heat until they are melted and incorporated. Remove from heat and allow to cool to 100-110°F.
Mix the Lye-Water: Put on protective gear including a mask, gloves, and long sleeves. Outside, carefully add the lye crystals to the kombucha water and stir until dissolved. Allow to cool to 100-110°F. If oil or lye water cool at different, you can use a cold or hot water bath in the sink.
Prepare the Mold: While the oils and lye water cool, line the mold with parchment paper.
Combine and Bring to Trace: When both oils and lye water are around 100 to 110°F, pour the lye water into the pot of oils. Use a stick blender or hand mixer to mix for 1 to 2 minutes and then let the mixture rest for 4 to 5 minutes. Repeat mixing and resting until light trace.
Mold the Soap: Pour the soap mixture into the mold, cover with a lid or parchment paper and insulate with a blanket for 24 hours.
Cut and Cure: Remove soap from the mold. If it seems too soft to remove, wait another 12 to 24 hours before removing. Cut the soap into twelve 4-ounce bars. Allow the bars to cure for 4 to 6 weeks.