A handmade olive oil soap with ginger and aloe vera, from Daki, a small Portuguese artisan soap works.
Why olive oil, and why handmade
Soap is made by saponification: an oil reacts with an alkali and becomes soap plus glycerine, and the reaction completes in the finished bar, so no lye remains in it.
What matters is the glycerine. Industrial manufacturers extract it and sell it separately because it is valuable in its own right — part of why commercial bars can leave skin feeling tight. A cold-process handmade soap keeps all of it, and glycerine is a humectant that draws water to the skin. That, more than any single added ingredient, is why a handmade bar feels gentler.
Olive oil makes a particularly mild soap with a creamy, low-bubble lather — the basis of Castile soap, used around the Mediterranean for centuries for exactly that mildness.
Ginger and aloe
Ginger gives the bar its scent: warm, dry and slightly peppery, which is a considerably more interesting thing to wash with in winter than the usual florals. It is one of the few genuinely warming smells in soap.
Aloe vera contributes slip and a softer feel in the hand. Its reputation rests mostly on soothing skin after sun, which is a leave-on use — in a soap that is rinsed away in under a minute, expect a pleasant texture rather than a treatment. We would rather say so than imply otherwise.
Making it last
Keep it out of standing water. This single thing decides whether a handmade bar lasts a month or a week. A bar left in a puddle absorbs water, goes soft and dissolves. Use a draining dish or slatted rack and let it dry fully between uses — kept dry, olive oil soap hardens and improves with age.
Note
For external use. Avoid the eyes. Ginger is warming and can tingle on very sensitive or freshly shaved skin — test a small area first if you are prone to reacting. Handmade soaps vary slightly between batches.