Cut up the goat milk soap into small chunks, about 2 cm x 2cm and place in a glass microwavable jug.
Microwave in 20 second increments, stirring well after each 20 seconds. Mine took around a minute to be fully melted. Don't overheat as it will cause the soap base to start bubbling up.
One all the lumps are melted, add the lemon zest and lemon essential oil.
If you are using the colorants, now is the time to add them.
Then add the poppyseeds and mix well.
Place your soap molds on a flat even surface where they can stay, untouched for the next few hours.
Pour your soap into the mold.
I let my soap sit for around 12 hours, allowing it to harden up before popping it out of the mold.
With a silicon mold, the soap should pop out easily, once set.
If your soap has bubbles form on the top after you pour your soap base into your molds, you can spray the tops of the soap with rubbing alcohol (isopropyl alcohol) as this will help break them up and give you a smooth surface.
Citrus oils can cause photosensitivity, so I do not recommend exposing the skin to direct sunlight after topical application of these essential oils. However, essential oils in the soap bars are found in small, appropriate amounts that will not cause any phototoxic harm.