Begin with a bowl, grater and good quality, all natural bar of soap. I used Basil Lime French Milled Soap.
Grate the soap.
In a deep pot, add the gallon of water, 2 Tb glycerin, and grated soap. Over medium-high heat stir until the soap is dissolved.
It will look like sudsy water when it is through dissolving. Mine had lovely bits of basil floating in it and smelled divine!
Let it sit for 10-12 hours. It will begin to set up and become solid. Use a hand mixer and give it a quick mix. If it is too thick, add a little warm water until it is your desired consistency.
Pour into a large gallon container to store. Dispense in a normal hand soap dispensre. It makes nice gifts, smells great, and costs just pennies to make. The gallon+ cost less than $3.00