Carefully cut your soap base into 1 inch cubes and add 8 to a microwave-safe glass measuring cup
Melt soap base in microwave. Start with 30 seconds on high. Stir with a wooden craft stick, and then heat in 10 second increments (stirring in between each interval) until soap base is melted. (This only took 40 seconds TOTAL for mine 30+10)
Mix in 1 Tablespoon "add-ins" : coffee grounds, dried herbs, dried citrus peels, dried lavender, oats, etc. This recipe used 1/2 Tablespoon dried lavender and 1/2 Tablespoon oats, both ground with a coffee grinder.
Add 30 drops of essential oil and stir. For this recipe I used 30 drops of lavender essential oil.
Pour mixture into silicone soap mold.
Allow soap to cool and harden at room temperature, then pop them out of the silicone mold and they are ready to use.