First, the eyelids were sewn shut and the lips were skewered with sticks. Then, in a large boiling pot of water, the heads were simmered, emerging about a third of their original size with darker skin that was more rubbery and tough. The process continues as hot stones and hot sand was placed inside the heads, which created a “tanning” effect on the inside, and the head was shaped further using additional hot stones until it was molded into the desired shape.
Overcooking the heads makes them gooey and they don't keep very well so I'm careful not to do that. I love these recipe threads.
Hope that helps!
I saw an actual shrunken head. A white woman with very long blonde hair. Preserved in a large bell jar with a heavy wooden bottom. Cecille B. DeMille estate. No kidding. Wish I had not.