Set up a double boiler or place a glass bowl over a pot of simmering water.
Add the beef tallow, shea butter, and beeswax pellets to the double boiler. Stir occasionally until melted.
Remove the mixture from heat and allow it to cool slightly. Stir in the essential or fragrance oil.
Pour the mixture into silicone molds or muffin tins.
Let the molds sit at room temperature for 6–8 hours, or place them in the freezer for about 1 hour to harden.
Remove the bars from the molds and store them in an airtight container in a cool, dry place.
