Melt goat's milk soap base over a double boiler or microwave, stirring every 30 seconds.
Stir in almond oil (or another carrier oil alternative) and essential oil into the melted soap. Optional: add 1-2 drops of pink soap dye and stir until well combined.
Add sugar to the liquid mixture and quickly stir together. Pour the mixture into the mold and spread evenly with a spatula.
Let the sugar scrub cubes harden for at least 4 hours, preferably overnight, before removing them from the mold. Store in an airtight container until ready to use.