Making DIY Oat Milk For Handmade Soap

Sometimes you want the benefits of oats in your soap without the scratch. Even ground oats can be quite exfoliating. You can use colloidal oatmeal, or if you want, you can make oat milk!

I like making oat milk as a vegan alternative to goat milk. So instead of goat milk and honey soap, you can make oat milk and agave soap for your vegan customers. 🙂

DIY Oat Milk for Handcrafted Soap

Making DIY Oat Milk For Handmade Soap

You will need:

  • Oats
  • Distilled Water
  • 16 oz. Jar
  • Cheese Cloth

To make oat milk simply grind old fashioned or steel cut (not instant) oats in grinder or food processor. Put 1/4 cup into a 16 oz. mason jar. Top off with distilled water. You can use more or less oats depending on what you are going for.

If you want your oat milk thicker, then use 1 cup oats (before grinding) to 3 cups water.

diy oat milk for soap

I usually let it sit out for an hour or two, stirring occasionally. And then I put it into the fridge overnight to use the next day. Give it a shake every now and then.

Once you’re ready to soap, strain it. I just top my jar with some cheese cloth and rubber band and pour it into another container.

Now we’re left with a wonderful oat milk ready to soap! You can use the oat milk in any recipe. Simply replace the water with the oat milk.

Happy Soaping!

-Amanda Gail

About the Author:

I am a soapmaker, author and blogger! I started blogging in 2008, sharing soap recipes, design tutorials and publishing articles on various topics of soapmaking.


  1. Laura March 8, 2017 at 1:50 pm - Reply

    Thanks for the simple tutorial, Amanda :). I am having some issues using it though :(. I made the “thick” or more concentrated version and tried adding my lye to my combo of water and oat milk. I instantly got serious yellow lumps…gross! I tried a second time, this time while working in an ice bath thinking it was the heat reaction with the oat milk. Awful yellow lumps again, they just took a touch bit longer before they developed. Since I had all the oils ready to go, I quick did a search for more info/help. It seems it is generally recommended that oat milk be added after you reach light trace, so the third time I tried that. Things went much better, but eventually, my soap did develop the weird lumps. I noticed it on the top of the batch not long after I poured it into the mold. Then when I unmold and cut it, I could see the bars had the lumps all throughout and just look weird. Do you have success not freezing and adding your lye right to it? Am I missing something? I did have some of the ground oats left in the milk because I wanted to still incorporate some “colloidal” oatmeal in the bar. This has not caused problems before though, as I’ve added ground oats to another batch. I would love to hear more specifics on how to use oat milk successfully :). I will probably not make the thick version again though, that will be my next test! 🙂

  2. Deborah A Mims March 6, 2017 at 2:07 am - Reply

    Hi Amanda, when I mixed the lye with the oat milk it got semi thick is this suppose to happen? Also I usually soap with my oils and lye solution with temperatures at 130 with this mixture should I soap at a lower temp? Also I’m a CPOP soaper would the oat milk work with this process or only for cold process soaping?

  3. elgreco handmade natural cosmetics February 24, 2017 at 12:49 am - Reply

    How to keep the properties of coconut milk if you do not freeze it?

  4. Margie Bayer February 10, 2017 at 2:00 am - Reply

    I’ve been using 1 teaspoon of Colloidal Oatmeal per pound of oils, which doesn’t sound like very much to me, compared to other soapers who use 1 tablespoon p p o o. My Coconut milk, honey, and oatmeal bars don’t feel very smooth while curing. I’m going to try this method and use part coconut milk and part oat milk to see if the soap turns out smoother. Thanks for the great article! See you on Saponification Nation! 🙂

  5. Samantha Shum February 6, 2017 at 6:09 pm - Reply

    Sounds amazing Amanda!!! I cant wait to try.

  6. Rory February 6, 2017 at 1:01 pm - Reply

    Can oat oil, oat extract, and oat milk be used interchangeably? I read that oats were good for sensitive skin, extremely dry skin, and damaged (eczema and psoriasis) skin so I bought a lot of oat oil, some oat extract and some colloidal oatmeal. Is oat milk better than oat oil?

  7. Kim February 6, 2017 at 10:25 am - Reply

    Hi, Why is instant not advised?

    • Amanda Gail February 6, 2017 at 12:59 pm - Reply

      It just creates a mush that isn’t easily strained. At least that has been my experience. You could give it a go and see how it works for you.

      • Kim February 6, 2017 at 2:04 pm - Reply

        Thank you! That is great to know! Definitely do not want mush! 🙂

  8. K.Young February 6, 2017 at 9:25 am - Reply

    Do you have a nice recipe to use this in? Maybe one with oat oil/butter to maximize the goodness?

  9. Grazina Siale February 5, 2017 at 9:02 pm - Reply

    Hi hi Amanda, does it discolour your soap? What a great idea! Also does it make the bar more creamy/ lathery/ something else? Thanks for all your knowledge-sharing, I’m so grateful.

  10. Hilda Bahner February 5, 2017 at 6:37 pm - Reply

    Fabulous recipe Amanda, thank you!

  11. Janie February 5, 2017 at 12:16 pm - Reply

    I hate oat scratchiness! Been doing this for awhile and it works wonderfully.

  12. connie mardon February 5, 2017 at 11:51 am - Reply

    Thanks, Amanda…do you freeze the oatmilk the same as any other milk before adding to the lye?

    • Amanda Gail February 6, 2017 at 9:05 am - Reply

      I actually didn’t freeze it and it came out okay. I’m going to do another post where I used it. You certainly could freeze it though! 😉

      • connie mardon February 6, 2017 at 2:30 pm - Reply

        mmmm…I am wondering if it goes darker when you don’t freeze it….i’m going to give it a whirl…some say it feels like silk…:)

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