Grate or chop the soap into smaller pieces before adding to a food processor.
Blitz the shop until chopped super fine.
Add the Epsom Salts and blitz to mix.
Add the bicarbonate soda and blitz again to mix.
Add the washing soda and blitz.
While mixing, add the drops of essential oils through the lid.
Give it a good mix.
Store in an airtight container.