I add anise oil to a soap that I sell for fishing folks and hunters alike. Anise (black licorice) will mask your human scent and allow a more "productive" time fishing and hunting. Try using 1 dram in a 1 lb fat batch.
I like using yellow coconut oil for the coconut and when tracing occurs stir the anise oil into the mixture, then scoop out about 20% of the traced soap mixture and add cocoa powder starting with 1 tsp. and working your way up from there. Then pour out the yellow mixture and swirl the brown through the yellow being careful to not over mix.
Allow to cure for 2-3 days, remove from mold and allow to finish curing in an area with good air circulation.
Makes 1.25 pounds of soap.