Using herb and flower infusions in soap can add a little something extra special to your soap. I love using both chamomile and calendula (marigold) infusions in my soap. Both impart a pretty butter yellow to the finished soap. There is a slight scent in the oils, too, but I find that scent doesn’t usually survive the saponification process, and I have used fragrances and essential oils successfully in soaps with infused oils.
There are a couple of techniques you can use for infusing oils. You can put the flowers or herbs in a jar, pour your oil over them, and let them infuse for several weeks, but I like the slow cooker method, mainly because it’s quicker, and I’m impatient.
I purchased these handy “tea bags” from Bramble Berry (who is not sponsoring me; I just like the product). While you can pour the oils directly over the botanicals, I have found it is pretty messy, and you have to strain the oil later. The tea bags allow the botanicals to infuse the oil without making a mess. I try to use about ½ to 1 ounce of botanicals (which is a lot more than you’d think—they are light). I put the botanicals in the tea bags and seal them closed with an iron. Then I put them in a jar, I pour olive oil over the filled tea bags. I put a few inches of water in my slow cooker, turn it on low, and gently lay my jar in the water. I let the oil infuse in the heat of the slow cooker for about five hours, turning the jar over every once in a while (be careful; it’s very hot). The jars can be hard to open afterward, but I have a nice infused olive oil to use in my soap when I’m done.
If you want to try out infused oils in your own soap, check out this recipe for a one-pound batch.