it seems that using fresh milk in soap has loads of problems with going brown when lye is added, ive tried the frozen milk idea and that seems to be better, but I,m just thinking has anyone added powdered milk to just traced batter? it might be a good idea to add all the benefits of the milk to the soap with none of the problems - or not??
Dried milk powders (goat, cow, buttermilk etc.) can indeed be used in soap. I do it all the time. The key is to accurately measure and mix the powders in distilled water and use that as a partial substitution of the liquids called for to dissolve the lye, added to warmed oils before lye/water.
To illustrate, if you have a recipe that calls for 11 ounces of water, I cut that in half (5.5oz) and use my milk mixture for the other 1/2.
I make up my milks solution early with a lidded quart cup that has a wire mixing ball to help mix the powders. I think that it takes 4 of the included scoops to make a quart of goat milk. With buttermilk it takes less, I think. To make a quart of a mixture of goat
and buttermilk, I add 1/2 of the required amount.
I then add these to the oils
before the lye/water is added. This is emulsified real well. If you mixed up your milk powders well, you will not have dried floaties. You might have a few bubbles after emulsifying but you can knock these down easily.
Then you add your lye water and proceed as usual. Make sure you soap at about 100 degrees F or less. I sometimes end up putting my lye water in the fridge to cool it down. This is a key point in using milk in soap. Low temps but my way doesn't require an ice bath unless you want to go that far.
As an aside, I rarely put my soaps in the fridge to cool unless I see the top splitting, even with partial milk soap. Now, if it is a full milk soap, I will put in the fridge overnight.
Like Celine in "Iamhomemade.com", I will often use greek yogurt as a portion of the halved milk mixture. In the above example, the 5.5 oz of milk mixture would be further reduced by about an ounce for the yogurt, leaving 4.5oz of milk mixture.