DR. BRONNER'S HOMEMADE LAUNDRY SOAP 1 C Dr. Bronner's pure castile liquid soap 1 C baking soda 2 C water 1/3 C salt. Warm the water & mix w/ salt & baking soda til dissolved. Pour into a one-gallon container. Add the Dr. Bronner's & fill the remainder jar with water. Use 1/4 cup of laundry soap per load. This laundry soap doesn't create suds, but it doesn't need to in order to get your laundry clean.