After a long afternoon brewing what do you do with that leftover grain? More importantly, what do you do about that sweaty bod? You'd be surprised to find that making your own bar soap out of beer and spent grain isn't all that difficult.
Next, we want to combine our flat beer to the lye. Before doing that make sure that you are wearing protective gloves and eyewear in case there is any splashing. Always add lye to the beer instead of the other way around. Be sure to use a heat-resistant material such as Pyrex since this reaction generates a lot of heat. I also recommend going outdoors or near a window for ventilation. After stirring the lye into the beer for 30-60 seconds, check out the reaction in the video below...
Making beer soap is much easier than making beer. It's also a nice way to use some of your waste in terms of any expired beer or your spent grain (although a very small portion). I plan to continue searching for combinations of beers and essential oils that work well together.
As for the finished product.......it actually works. I still need to dial in the right amount of essential oil and figure out the best time to add it in the process because the bars end up smelling more like oil and lye than the essential oils that I intended.