Put on safety gear including rubber gloves amd safety goggles.
Using a kitchen scale, measure out all your ingredients.
Heat your oils over low heat until fully melted and it has reached 115 degrees F.
In a well ventilated area, add your lye to the water in your pyrex glass, stirring constantly. It will get hot very quickly.
Cool your lye water in an ice bath until it reaches 115 degrees F.
Add your oils to a large bowl and then slowly add your lye water to the mixture.
Using an immersion blender, blend mixture until it reaches trace (pudding-like consistency).
At trace, add in your matcha powder. Blend until fully combined. Add in your essential oils and blend again.
Pour your soap into a load-style soap mold. Wrap in a towel and place somewhere warm for 48 hours.
After 48 hours, remove your soap from the mold. Cut into desired sections.
Leave your soap to cure on a wire rack for 6 weeks in a cool, dark place.