Lay parchment paper down next to your stove to make clean-up easier.
Measure out your wax flakes. A good rule of thumb is to double the volume of each candle vessel.
Heat the wax on low heat, stirring frequently just until the wax flakes are melted. Then, remove the pan from heat.
While the wax is cooling slightly, fasten the wicks and metal tabs. Center the wicks inside your vessel. Make sure that the wick tab touches the bottom. Then, wrap the excess wick around a pencil or wood dowel and rest on the top opening.
Add roughly 20 drops of each essential oil per candle to the pan and give it a stir. The number of drops you’ll need will greatly depend on how strong you’d like the scent to be and the brand of essential oil you use. Since I’m making 2 candles, I’ve added 40 drops of each oil. You can be very generous since it takes a lot of oil.
Evenly divide the wax between the vessels and allow to cool to a solid state. You can speed up this process by placing the candles in the fridge for about 12 hours. They will also harden overnight when left out.
Once the wax is completely cool, trim the wicks to ½”.
Optional — If giving these essential oil candles as gifts, wrap the candles top to bottom with ribbon and secure with a piece of tape on the bottom of the vessel. Garnish with rosemary sprigs.