breast milk soap DIY - without mixing lye on your own

How to DIY breast milk soap – no lye mixing easy recipe

I’m not like one of those moms who have plenty of breast milk supplies, but I have a friend who does. She had too much supply that she needed to donate it to me. (hooray!) However, when I got those breast milk from my friend in another city (yep, we actually live three hours apart from each other, and these supplies were shipped to me), we discovered that my little one is a picky eater. He doesn’t like anyone else’s breast milk besides his mom’s (I feel sweet but sad at the same time). Therefore, I have to somehow return bags of breast milk back to my friend in another format that will help keep the breast milk longer! (breast milk can be kept 3-4 days in the fridge, 3-6 months in the freezer), and that’s why here is this article – DIY breast milk without mixing lye on your own!

Not sure if you’ve done some research about making soap with mixing lye, which can be dangerous because lye burns when mixed with breastmilk, so somehow to me it’s highly technical that I don’t want to try. As a person who wants to do things efficiently and easily, here’s an easy DIY recipe to make breast milk soap without mixing lye in on your own.*

You can purchase those melt and pour soap base from Amazon(I’ve listed what I bought down below, and they’re ORGANIC SOAP BASE, which makes me feel extra healthy!). The basic recipe is that you melt the soap (0.5lb) in a microwave at high the first 30 sec, and then 5-10 sec incremental until it’s all melted (careful not to have bubbles created when it gets too hot, the bubbles will not disappear and will make the soap look ugly). Once you’ve got it melted, mix in 1 cup of room temperature breast milk. Stir until it’s well mixed, and pour the liquid into any shape of containers that you wish to make your soap. (I’ve used empty plastic yogurt cups, but, if you want to get fancy, try these beautiful flower silicon containers). Put the cups/containers into your fridge and wait for a couple hours, and that’s it! You’ll have beautiful breast milk soaps that you can store and use.

(psst.. if you’re ever interested in knowing what baby food storage I use, check out my latest article here)

Now, if you want more variation, you can add in honey or oatmeal. Honey adds moisture and oatmeal make it look beautiful. Or, you can just purchase those pre-made organic soap base with honey or oatmeal, so you only need to melt the soap and add in the breast milk. In my pictures, I’ve had one soap added in coffee powder (for skin exfoliation), one soap added in white sugar and lavender (for skin exfoliation and smell), and others with oatmeal. I’ve also added in Vitamin E OilGrape Seed Oil, and some essential oil that I personally liked.

Here’s the organic melt and pour soap base I used: (you can see the finished breast milk soap I made in the pictures above)

Cocoa Butter – 2 Lbs Melt and Pour Soap Base – Our Earth’s Secrets

Honey – 2 Lbs Melt and Pour Soap Base – Our Earth’s Secrets

Oatmeal- 2 Lbs Melt and Pour Soap Base – Our Earth’s Secrets

Organic Clear Glycerin – 2 Lbs Melt and Pour Soap Base – Our Earth’s Secrets

*Note. I did my own research online by reading articles and this blog is my experience on making my breast milk soaps. I don’t have a chemistry background nor am a soapologist but just a mom who likes to share my experience with other moms.

Last but not least, I’ve started another section of this blog dedicated to baby food, so click here to read the first article – choosing baby food storage. 

15 thoughts on “How to DIY breast milk soap – no lye mixing easy recipe

  1. Thanks so much for this recipe! How many body bar soaps do u get from this recipe please? I’m in Canada and the 2lb soap base will cost me $25 from Amazon (your link) before the exchange rate even. So 2lb of soap plus 4 cups of breast milk I’m hoping makes a lot of soaps.;) also can I use frozen breast milk or is fresh better? Thanks so much! Ashley


    1. Hi Ashley I was just calculating per the recipe, 2lbs of soap base plus 4 cups of milk would yield 64 ounces or 4 pounds. I hope that helps.


      1. I love this recipe and have made my own creations with the melt on pour bases. My only problem is I have so much expired Brest milk it’s not even funny. What’s the shelf life of this soap if they are placed in the deep freezer?


      2. Hi Lauren, I’m sorry that I’m not a soapologist but just a mom myself. I’d say the shelf live is pretty short, and I’m not really sure how expired breast milk will do to skin. =( It’s better to use non-expired breast milk is what I would suggest though.


  2. Hello there!
    I can’t wait to try this recipe as I have been wanting to make breastmilk soap for a while. My question is, if I use your recipe and get those soap molds you suggested on Amazon how many soap bars will that make? Will the 6 molds be enough? Lastly, how long do these last and how do you store? Once made do you store them in the freezer or fridge and do they expire or leave them out and it’s okay? Thanks!


    1. Hi Susanna, I’d recommend you put them in the fridge or freezer as to how you’d keep the breastmilk. Since you added in the fresh ingredients, it is also better to use it as soon as possible. I can’t answer on how many molds you can make and if 6 is enough, because it depends on the amount of soap and milk and other things you’re mixing in. Hope this helps.


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