Most of us reach for a mug of “herbal tea” without a second thought, but if you’re speaking to a purist, you might be corrected. Technically, what you’re drinking is a tisane. While the word “tea” is colloquially used for almost anything steeped in a cup, true tea is made with tea leaves from the Camellia sinensis plant. All these confusing terms, whether herbal infusion, medicinal tisane, or decoction, describe using water as a solvent to unlock certain chemical constituents of plants to enjoy their flavors and health benefits. While bringing up the “correct” name for a herbal brew is pedantic and unnecessary, there is a difference between gently steeping delicate herbs and flowers or boiling rugged bark to extract their full potential. The word tea was expanded to include tisanes, herbal infusions, and decoctions long ago. If you’re like me, you’re quite satisfied with this state of affairs. But these exotic and sometimes technical-sounding terms can still be confusing and require some clarification.
A Tea is an Infusion
First of all, if you are wondering about infusions or something “being infused,” I’ve already written up a piece on the definition. Teas, tisanes, and decoctions are all infusions. When something is infused, it generally means that a plant material of some kind has been boiled in water or soaked in something that acts as a solvent, such as alcohol, so that some of its flavor and elements have been extracted into the liquid. Therefore, infusion is an umbrella term that covers all these preparations. However, the word infusion is also used in cooking.
What is a Solvent?
I don’t want the term solvent to throw a wrench in the works. A solvent is just a liquid that is able to dissolve other substances. You know that you can dissolve salt or sugar in water, so water itself is a solvent. You also know that both salt and sugar will dissolve faster in hot water, so hot water is a stronger solvent than cold water, and alcohol is generally stronger still. From here, things get dicey because not all that which is soluble is able to be dissolved in any solvent. For example, some things are only fat-soluble, but none of this matters for our discussion.
What is a Tisane?
Generally, tisane, which is sometimes spelled ptisan, is a word used for an herbal infusion, or, in other words, an herbal tea. Originally, it referred to these types of drinks used for medicinal purposes. The word tisane comes from the Greek ptisane, a barley-based drink. Today, it refers to any herbal or grain-based tea. While some regions focus on its medicinal benefits, the term applies whether you drink it for health or just for flavor
Tisane is a general term for herbal tea, but certain herbs are favored more often than others, depending on the country. For example, La Tisaniere French Tisane is a mixture of herbs that contains one herb that seems to be very common to French tisane, verbena (or lemon verbena), along with anise, lemon balm, and mint, used as an after-dinner digestive.
What is a Decoction?
Decoctions can also be called teas, and they are also made from plants. In fact, a decoction may be made from the same plant as a tisane. The difference is usually in the time span and method of extraction, and more importantly, the plant parts being extracted.
Whereas a tisane or simple herbal tea is made by steeping leaves, flowers, and other soft parts in very hot water for up to ten minutes or so, decoctions are used for tougher, more fibrous parts of a plant, such as the roots, bark, and, depending on the plant, dried seeds. Instead of a familiar steep in hot water, these parts are simmered in water for up to 45 minutes (and sometimes even longer).
As fancy as the terminology seems, there is nothing very complicated about it. Simply speaking, it takes longer to make extractions from hard fibrous plant parts, so the water must be kept hot for a long period of time in order to break down the cellulose enough to infuse the water. Sometimes, the same roots and/or barks will be simmered twice, and the two resulting liquid extractions will be mixed.
Sometimes, leaves and other parts normally used for herbal teas are used in a decoction to create a stronger medicinal brew when taste doesn’t matter. In these cases, you might also consider a tincture. These are highly concentrated extracts made using alcohol, glycerin, or vinegar as a solvent. Usually, a tincture is made from a single herb rather than a mixture of herbs, and then different tinctures are mixed together if desired.
Herbal Teas Require Longer Steeping Times
One key difference is that tisanes often need more time to steep than true tea. Many herbs require ten minutes to reach their full potential. If your herbal tea lacks flavor or hasn’t helped you relax, you may just need to soak it longer.
For the most part, go for a good five minutes for most herbs, but if you buy herbal tea bags or other packaged herbs for brewing, read the instructions for brewing on the package, which will probably provide recommended steeping times.
Quick Comparison: Infusion vs. Decoction
| Feature | Tisane | Decoction |
|---|---|---|
| Plant Parts | Leaves, flowers, soft stems | Roots, bark, seeds, nuts |
| Method | Steeping in hot water | Simmering on a stovetop |
| Time | 5–10 minutes | 20–45+ minutes |
| Goal | Extract delicate flavors/oils | Break down tough fibers to extract compounds |
How to Properly Brew a Decoction
While a standard herbal infusion involves steeping delicate leaves or flowers in hot water for about 5 to10 minutes, as explained above, a decoction is necessary for tougher plant materials. This process uses sustained heat to break down dense plant structures like roots, bark, and dried seeds. Below are the general steps required to prepare a decoction.
FAQs: Understanding Your Herbal Brew
- Is “herbal tea” actually tea? Technically, no. True tea must come from the Camellia sinensis plant. Most drinks we call “herbal tea” are actually tisanes or herbal infusions.
- What is the main difference between a tisane and a decoction? The difference lies in the plant parts used and the brewing method. Tisanes (steeped leaves or flowers) use a quick hot-water soak, while decoctions (roots or bark) require a long simmer on the stove to extract deep-seated compounds.
- Can I make a decoction out of delicate tea leaves? While you can, it is usually not recommended for taste. Boiling delicate leaves like green tea or chamomile for 20–45 minutes can lead to a very bitter, over-extracted flavor. However, some do this for medicinal purposes when taste is not the priority.
- How long should I steep my herbal tea? Unlike true tea, which can become bitter if left too long, many herbs benefit from a longer steep of 5 to 10 minutes to fully develop their flavor and benefits.
In summary, while we often use the word “tea” as a catch-all, true tea
specifically requires the leaves of the Camellia sinensis plant. Most “herbal” versions of tea are technically tisanes, which rely on a standard infusion
of soft leaves or flowers, just like tea. However, when you’re dealing with the rugged strength of roots and bark, the gentle steep of a tisane isn’t enough; you must use a decoction to break down the tough parts and simmer out the medicinal compounds. Whether you’re a purist or a casual drinker, knowing these methods ensures you’re getting the most out of every cup.
