Cold Process Soap: Half and Half Method with Goats Milk

Ready for part 2 of milk cold process soap? We are going to follow the same recipe and steps as the post yesterday, but we are going to use goats milk instead.

What is the advantage to using the Half and Half Method rather than adding the milk to the lye solution?

The advantage is that we allow the normal saponification to happen, without stalling using cold temperatures, we get firm soap quickly, AND we don’t have any separation in the mold. We feel that our best batch of soap is the first batch and by following the Half and Half Method, we reduce the chances of our soaps failing and increase our chances of getting that perfect batch of soap the first time around.

The Half and Half Method is actually very easy to follow. Here are the directions that we will follow in a step by step format.

1) Calculate the amount of lye and liquid needed for the oils you plan to use.

2) Measure all of the oils and set aside to heat gently.

3) Measure the lye and set aside.

4) Measure HALF of the needed liquid as water and set aside. Measure HALF of the needed liquid as milk and set aside. Milk should be room temperature, not frozen or heated.

5) Add ALL of the lye to the water. Stir well. No crystals should remain on the bottom of your mixing vessel. When the temperature of this lye solution is within 110° F to 130° F, (cooler in the summer and warmer in the winter, cooler for large batches and warmer for small batches), add it to the oil mixture. Blend with an immersion blender until you estimate you are halfway through the mixing process. This will happen with most oils in about 1 minute. The mixture should NOT be thick or viscous. The mixture should be very fluid, like water.

6) Now steadily pour the milk into the batch. Use the immersion blender to finish the blending so there is no chance of separation.

7) Add fragrance. Pour into prepared SHALLOW molds (1 inch deep or so). Milk soaps can get very hot and shallow molds help the excess heat dump into the air. This will prevent the milk sugars from interrupting the saponification reaction.

This is called the Half and Half Method, because you use half water, half milk, and add the milk half way through the blending of the batch.

Collect needed items:

Ingredients
Hydrogenated Soybean Oil
Coconut Oil
Olive Oil
Sodium Hydroxide
Goats Milk
Water
Equipment
Scale
Soap Spoon
Gloves
Extra Large Square Tray Mold
Square Tray Mold
Immersion Blender
Time spent:
Weighing time: 8 minutes
Adding lye to water: 15 seconds, followed by 60 seconds of stirring
Heating of oils time: 3 minutes
Pouring lye solution into the fat mixture: 10 seconds
Using immersion blender to mix soap solution: 90 seconds
Adding milk to the batch: 20 seconds
Using immersion blender to completely mix milk into soap: 40 seconds
Pour into molds: 60 seconds
Allow soap to rest: 24 hours
Recipe in ounces:
40 ounces weight Hydrogenated Soybean Oil
20 ounces weight Coconut Oil
20 ounces weight Olive Oil

11.1 ounces Sodium Hydroxide
15 fluid ounces Goats Milk
15 fluid ounces Water

Tomorrow we will make a Buttermilk Soap. We only have Soy Milk and Almond Milk left after buttermilk!

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Oils ready for the microwave.

Adding lye to the water.
Mixing the lye solution.
Adding the lye solution to the melted oils.
Mixing the batch to halfway to trace.
Almost ready for milk to be added.

Adding the milk to the batch.

Batch at complete trace.

Filling the second mold.
Pouring the batch into the mold.

Filled molds resting.
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3 thoughts on “Cold Process Soap: Half and Half Method with Goats Milk”

  1. Thanks, Andee. I have tried several methods for making ‘milk’ type soaps. As an experienced soap maker, this is the only type of soap where I lost an entire 5 pound batch…but only once. The ‘half-n-half’ method has been my most relied upon method for perfect soap.

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  2. Yes I definitely love using the “half and half” method too. It’s worked well for me… milk, goats, coconut milk… I’ve tried the full milk way, but it smells terrible at first and although it did turn out good for me I think if it had gotten any hotter it would have been a terrible nightmare.

    Thanks for sharing this with us! I’m excited to try almond milk when you share it! I made a batch with almond milk and chocolate once. It smelled fantastic but when I cut it open it was a gooey caustic nightmare!

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