Measure the dried hops into a spice grinder or small food processor, process until it's a very fine powder.
Measure your milk powder, Epsom salt , baking soda, malt powder, and hops into your plastic baggie, along with colouring if you're using it
Use an eye dropper to measure your essential oil into the ingredients baggie.
Press most of the air out of the bag, and close the zipper on it.
Manually crush any clumps in the salt, and work to combine the ingredients.
Transfer mixture to an airtight container.
To use, measure 1 cup of Hop Malted Milk Bath into a hot running bath. Rinse after use