I tried homemade powdered laundry soap, but unless I always washed in very hot water, I often found powder residue on my clothes, especially dress pants for some reason. I much prefer this liquid soap.
10 cups very warm water
3/4 cup baking soda
1/4 cup salt
3/4 cup liquid Castile soap (I use citrus and omit the essential oil)
at least 1 tablespoon of essential oil (or use pre-scented Castile soap)
Dissolve the baking soda and salt in the warm water — it talks a few minutes. I stirred it around with my hand until I couldn’t feel any salt in the bottom of the container.
Add the liquid Castile. Stir. Pour into a recycled laundry detergent container. This is the perfect amount for a 100 oz liquid detergent bottle.
Use 1/4 of a cup per load. Shake before each use.