This DIY Soap recipe is called a Bastile soap, don’t know what that means? This is what I found.
In soap making, the term “bastille,” commonly refers to cold process soap made with at least 70% olive oil. Olive oil is extremely gentle, making it the perfect oil for delicate or sensitive skin. This Buttermilk Bastille Baby Bar is comprised of olive oil and a small amount of coconut oil for cleansing properties. Source
This DIY soap recipe is gentle and perfect for sensitive skin.