Place the purified beef tallow in a heat-safe bowl. Set the bowl over a saucepan with a few inches of gently simmering water to create a double boiler. Melt the tallow fully, then remove from heat.
Stir in the rosehip oil, jojoba oil, and vitamin E until smooth.
Allow the mixture to cool slightly until opaque but still soft.
For a soft balm, whip briefly with a hand mixer. For a firmer balm, skip whipping. If using essential oils, stir them in before transferring to jars.
Spoon or pour into a clean glass jar and seal.