Marshmallow shows up in blends primarily as marshmallow root and marshmallow leaf; some products also include mini (puffed) marshmallows for a sweet garnish.
Reviewers commonly recommend long steeps of about 10–15 minutes for full strength. Some also suggest using two tea bags for a stronger brew.
Marshmallow teas are sold as loose-leaf herbal blends (commonly in upright pouches) and as counted tea-bag packs. Many of these blends also include other herbal ingredients such as dandelion root or flavored herbal components.
Most marshmallow herbal blends are caffeine-free. However, blends that include roasted tea or true-tea ingredients can be lightly caffeinated—one listing cites about 20 mg per bag for a lightly caffeinated blend.
Common companions include chamomile, plantain, rose hips, slippery elm, dandelion root, licorice, echinacea, and various fruit or floral notes like blueberry and jasmine. Some blends also feature roasted-tea elements (e.g., hojicha with toasted rice) or ingredients such as persimmon leaf and blessed thistle.