I made coffee soap in the oven. The oven process was great! Not so sure about the soap, though. I found instant coffee in the cupboard (no telling how long it was there) so I dumped it into a bunch of boiled water. It turned into syrup, so I diluted it to make the soap. But probably not enough. I needed .75 lbs liquid and .404 of it was coffee. The batter looked like Hershey's syrup. I threw 3 oz super fattening oil in after the cook and .75 oz coffee grinds for exfoliant before molding. I had enough leftovers on the sides of the pot to make a blob bar for the kitchen sink, but it's falling apart. I did a patch job on it with lots of water so I'll have to wait until tomorrow to see if it hardens enough to stay together. It lathered well, but I think it lathered brown. I didn't have the light on so I can't be sure. Experimenting is fun. Waiting to see the results is not.