To make a glycerite which you can use for medicine or as a sweetener in small amounts, you'll need fresh herbs, a mason jar, and food grade non-GMO vegetable glycerin.
Place fresh herbs* in a mason jar (size will depend upon how much herb you have), slightly packed to the top of the jar. Pour in food grade glycerin and stir with a non-metallic object like the handle of a wooden spoon to ensure the herbs are coated with the glycerin. Add more glycerin to the jar, all the way to the top. Place on lid and screw cap and let infuse for 4-6 weeks.
Strain using a sieve. You can place a coffee filter in the sieve, if you like, to ensure all small particles are removed. Store in dark amber bottles, and label. Shelf life: 1-2 years stored in a cool, dry place.
*Herbs that make lovely sweet glycerites (the 1st 4 are gentle herbs that offer relaxation while stevia is a plant that you can grow yourself and use as a natural sweetener):
N.B. Do NOT use plants from a flower shop! Use herbs that are pesticide and herbicide free, such as from your garden or a friend's garden. Since glycerin does not kill bacteria as alcohol (tinctures) do, make sure your herb is dirt-free and collect on a day when it hasn't rained for at least 2 days and the herb is dry. Water encourages mold growth and that is not something you want to be ingesting. In a similar vein, there are other ways to make glycerites, such as adding water and glycerin together with dried herbs, or using a combination of alcohol and glycerin together. Feel free to explore the variety of recipes that come your way!
As always, Enjoy :)