In a double boiler (or just a small pan inside a larger pan) with water in the bottom of the larger pan, place the shea butter, beeswax, and coconut oil in the top pan and bring to a boil. Leave in the pan long enough to melt all the shea butter and beeswax (5 minutes or less).
Remove from the heat and place in the refrigerator for a few hours – one to two. The cooling step is a very important part of the emulsifying process and cannot be skipped!
Once cooled (it will be harder), scoop into your mixer. A hand mixer should work just fine, too. Then, add the 3 tbsp. of zinc oxide and the 2 tbsp. of optional vegetable glycerin and beat for 5 to 10 minutes. The beating lets oxygen circulate through the cream to fluff it up and thicken it.
It will look creamy and oily when you’re done, but after several hours it will thicken up A LOT. It’s just as thick as Desitin and way less toxic!