Marshmallow root vs blue mallow
Both are Malvaceae sold loosely as 'mallow' and they contribute different things entirely. One gives a slippery mouthfeel and no flavour; the other gives a blue-grey colour that turns pink on acid.
botanical
What is being compared
Why these get confused
'Mallow' covers the root, the flower and hollyhock, and packets often do not say which.
Point by point
| Aspect | Marshmallow root | Blue mallow |
|---|---|---|
| The part used | The root of Althaea officinalis, peeled, cut and dried. | The violet flower of Malva sylvestris, dried fast in the dark. |
| What it contributes | Texture. It is almost tasteless and remarkably slippery in the mouth. | Colour. A blue-grey liquor that shifts instantly to pink when anything acidic reaches it. |
| Preparation | Cold infusion extracts far more of the mucilage than hot water does. | Steeped hot or cold, and the pigment survives cold better. |
| History | The original marshmallow confection, made from the root’s mucilage until the 1850s. | Eaten as a leaf vegetable in classical Europe long before the flower was dried for drinks. |
| In a blend | Present for body, and invisible in flavour terms. | Present for appearance, and it shares the colour-change trick with butterfly pea. |
The short answer
Neither is a substitute for the other in any respect. If a blend calls for mallow, work out from the context whether it wants texture or colour.
Not a ranking. TeaHQ publishes no ratings and does not know your occasion.