In a microwaveable bowl, add your cubes of glycerine soap. Microwave on high for 30 seconds. Microwave an additional 10 seconds and check to see if it’s melted. Repeat for another 10 seconds until it’s melted. Stir.
Add in drops of lemon essential oil and lemon zest and stir. Carefully pour into soap mold. Let sit for 40 minutes to an hour before attempting to remove it.
To remove, carefully push on the bottom of the mold until the soap releases.