Easy recipe and instructions for making pure white goat milk soap. Includes guidance on temperatures, equipment, and ingredients.
When you make goats milk soap, you can substitute some of the water used to make the lye solution with milk. Easier said than done though! Some years ago when I first began teaching myself how to make soap, I tried a recipe for goats milk soap. I tried and failed abysmally. The bars I cut at the end were yellowy-brown and crumbly and I couldn’t figure out what I did wrong. I’ve made a lot of soap since then and understand now that my temperatures were too hot. You’ve got to be mindful when using sugars in soap and that includes milk.
In this recipe, I’ll show you a way to make pure white goats milk soap. It’s a little trick that I’ve learned that combines a typical milk soap recipe with soaping at room temperature. The end product is a conditioning and very gentle bar of soap perfect for the most sensitive of skin.
Soaping at Room Temperature
This recipe is a little different from many of the others I’ve shared in that the temperatures are low. They’re low so that the milk in the recipe doesn’t scorch and change colour, and they’re low to avoid any strange crumbly messes. The lye-water will be at room temperature when we mix it into the oils, and the oils themselves will be just twenty degrees above that. I don’t usually soap at these temperatures but it needs to be done to avoid your milk soap turning brown. Oh, and you’re going to need both space in your freezer and refrigerator for this recipe too.
Goats Milk Soap Recipe
Makes 8 bars
For full information on soap making safety and equipment please head over here. It’s important to read it before trying to make soap the first time.
Add at Trace
8 drops Grapefruit seed extract (optional)
Step 1: Freeze the Goats Milk
Pour the goats milk into an ice cube tray and freeze.
Step 2: Make the Lye solution
Put on your rubber gloves and eye protection and set yourself up in an area with good ventilation. Under a hob, on the doorstep, or outdoors is perfect. Pour the sodium hydroxide into the water and stir with a stainless steel spoon. Be careful not to breathe in the fumes. Stir until the lye is completely dissolved and then set the jug aside to cool to 100°F (38°C).
Step 3: Add the Milk Cubes
When the lye-water has cooled, add all of the goat milk ice cubes to the jug. Allow the cubes to melt and for the lye-solution to lower to room temperature — that’s between 68-72°F (20-22°C)
Step 4: Heat the Solid Oils
As soon as you add the ice cubes to the lye solution begin melting the solid oils. In a stainless steel pan, heat the coconut oil and shea butter on very low heat until just liquefied. They’ll melt quicker than you think so don’t be tempted to turn up the heat.
Step 5: Add the Liquid Oils
When the solid oils are melted, take the pan off the heat and pour in the liquid oils. Being already room temperature, they’ll cool the hot oils down. Stir well and keep an eye on the temperature. You want the oils to cool to 90°F (32°C).
Step 5: Mixing
When the lye-liquid is fully melted and the oils are the right temperature, pour the lye solution into the oils. Immerse a stick blender into the pan and use it (turned off) to stir the contents together. Then bring the stick blender to the middle of the pan, hold it still, and pulse for a couple of seconds. Repeat the stirring and pulsing until the mixture begins to thicken. It will take a couple of minutes.
Step 6: Add the Antioxidant
When the soap batter has thickened to the consistency of warm custard, stir in the optional drops of grapefruit seed extract. It works as an anti-oxidant and helps prolong the shelf-life of your bars of soap. It’s not a preservative but rather an agent that helps stop oils from going rancid.
Step 7: Mold and Cool
Pour the soap into your mold, whether it’s the silicone soap mold, an empty paper milk carton, or something else. Now line the exposed part of the soap with plastic wrap and pop the mold into the refrigerator. Leave it there for 24 hours.
Step 8: Cut & Cure
Take the soap out of the refrigerator the next day but leave it inside the mold. Set it someplace on the counter and leave it there for three or four days to harden up a bit. This soap is very soft when it comes out of the mold and could break or get stuck if you try to cut it too soon. Use an ordinary kitchen knife to cut it into bars.
When cut, leave the bars someplace airy and out of direct sunlight to cure for four weeks. The soap is safe to touch 48 hours after making it but it needs the extra time to allow the excess moisture to evaporate out. For full instructions on how to cure handmade soap head over here
Using your Soap
The lather and feel of this handmade goat milk soap is fluffy and silky. The scent is softly milky and making the recipe just as it is will create bars ideal for sensitive and dry skin. If you’d like to scent these, you may add essential oil at the same time that you add the grapefruit seed extract. Read more about scenting soap with essential oil here — the article also provides recommendations on how much to use of each when making handmade soap.