r/soapmaking • u/SandMaleficent8211 • 7h ago
CP Cold Process Do Coffee Grounds Make a Difference in Kitchen Soap?
I made two kitchen soaps using the same recipe. For both soaps, I used frozen Americano as the water phase. The only difference was that the soap on the right contained dried spent coffee grounds.
To compare the lather, I rubbed each soap with the same sponge five times and collected the foam in a 16 oz cup.
For the cleaning test, I used the same 4-year-old stainless steel food container. I applied 1 tablespoon of roasted gochujang and 1 tablespoon of cooking oil, washed it with the foam, and rinsed it once with cold water.
Both soaps produced similar amounts of foam and showed similar cleaning performance.
I also tested dried spent coffee grounds at 0.1% to 2.4% of the total oil weight. I didn't notice any meaningful improvement in cleaning performance. As I increased the amount of coffee grounds, rinsing took longer and more coffee particles stuck to the dishcloth.