Cut the soap block into 1-inch blocks, if you want to make melting the soap faster.
Pre-measure the bentonite clay and colloidal oatmeal so they will be ready to add to the soap quickly once it melts.
Place the soap block pieces into the top of your double boiler. Add enough water to the bottom pan to just touch the pan, above. Turn the burner heat to medium-high and wait for the water to boil.
Heat your canning jar or jars either in the dishwasher, hot water, or in a water bath in a small pan.
Whisk the melting soap block until no solid pieces remain. Turn off the burner at once. It’s important not to overheat your soap. If you are using a thermometer, for best quality, it shouldn’t go above 130 degrees.
Whisk in the colloidal oatmeal and bentonite clay until combined.
Add 2 teaspoons of cinnamon powder and whisk to combine.
Add 10-15 drops of oil and whisk to combine.
Remove the top pan of the double boiler and the canning jar or jars from the stove.
Place the canning jars on a heat-proof surface and carefully add the soap. Use a funnel if you need to. Any remaining soap can be rolled into soap balls.