Homemade Natural Laundry Detergent Powder - The Blender
Instructions. In the bowl of your stand mixer, pour in the castile soap. Stir in the washing soda, and then the baking soda, and then add the vinegar 1/4 cup at a time as the mixture will foam. Whip it at a medium speed like egg whites for 5 to 10 minutes until the mixture thickens, and turns into a powder.