Use a double boiler. If you do not have a double boiler, no worries, you can use a glass bowl over a pot of water and bring it to a boil.
Melt down over medium-low heat
Carefully remove from heat and allow to cool down slightly (10-15 mins.)
Use a stand mixer or a hand mixer with a whisk attachment if available.
Mix until tallow is whipping into light fluffy goodness. (Time dependent on how fast the tallow cools down.)
Once whipped you can transfer into clear mason jars or amber jars if adding essential oils.
If adding essential oils, 1% dilution is recommended for adult use, which is approximately 50 drops per cup of whipped tallow body butter. Likewise, 0.25% is recommended for children so approximately 12 drops per cup of whipped tallow body butter.
You should keep your whipped tallow body butter in air-tight glass jars. Storing at constant cool room temperature to prevent melting and reversing the tallow being whipped. It will last up to a year at room temperature or longer if stored in refrigerator.