Liquid Laundry Detergent Using Castile Soap

Happy Monday!

This week our laundry detergent recipe is a liquid version.   I've made a liquid castile soap detergent in the past, which is a naturally mild soap and great for those with sensitivities or for washing baby clothes, but it was too mild for my laundry needs.

Then I found this recipe that included washing soda, which is a great additive and combined with the castile soap makes for extra muscle to fight strong odors.

If you normally wash laundry using cold water, a dry detergent mix might not fully dissolve and could potentially clog things up.  So a liquid version like this is a great option to have.

Here is the recipe compliments of Bren and her blog




  1. Bring 5 cups of water to a boil.
  2. Pour washing soda into a large glass bowl then slowly stir in 2 cups of boiling water until washing soda is completely dissolved.
  3. Add one tablespoon of baking soda at a time and stir well to combine. The mixture will thicken as baking soda is added until it is a pudding-like texture.
  4. Stir in ½ cup Castile soap until well combined.  Slowly stir in remaining 3 cups of boiling water.
  5. Cool to room temperature, the mixture will separate while cooling. (See separation in picture below.)
  6. Combine separated mixture by blending or whisking until smooth. (Tip: Pour the mixture into two quart size Mason jars before cooling then screw on a blender bottom to easily blend until smooth.)
  7. Store liquid detergent in a glass bottle. Use 1/3 cup per load of laundry

I'm two loads deep into my batch and I'm very happy with it.  I've noticed the essential oils I added seem to carry over better than my dry detergent recipe.

If you link to Bren's blog you can see she even does a cost breakdown per load.  I compared it to the price of ingredients I sell in the shop and am happy to report that it was very close.  Mine was just slightly cheaper.  (*Insert embarrassing celebratory dance here)

So if you're still searching for that perfect DIY laundry recipe, give this a shot and see how it measures up.  Feel free to comment on your likes and gripes as well.  I find myself reading comments a lot before I try a new recipe and it's extremely useful.

This will end our series of laundry related recipes this month.  Stay tuned for the theme for November - - it is going to be a great challenge!


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