We made some of this a few weeks ago and we love it.
What you need
1 Cup Mild Shampoo – Liquid Castile soap works – not as many bubbles with it (I am sure body wash, baby body wash, or baby shampoo will also work. – use what you already have on hand and are using)
1/3 Cup Liquid Glycerin
2 Tbs. Water
15 Drops Essential oil
Mix all ingredients together and add to a bottle or jar. I made a double batch and it filled a 1 quart Jar.
Shake a little before each use.