Real Marshmallows: French Guimauve with Marshmallow Root & Slippery Elm
Here's a fun fact I like to drop on clients: the marshmallow you buy in a bag has nothing to do with the plant it's named after. Marshmallows were originally a French confection made from the sap of Althaea officinalis, the marshmallow root, whipped with sugar and egg white into a soft, pillowy sweet. Somewhere in the industrial food era, the root got dropped and the name stuck around on a product made of nothing but gelatine, corn syrup and sugar.
This recipe puts the plant back in. I've taken a classic French marshmallow (guimauve) and rebuilt the base liquid as a strong marshmallow root tea, then added slippery elm powder for extra mucilage.
Ingredients
Marshmallow root infusion (replaces the blooming water)
2 tbsp dried marshmallow root (Althaea officinalis) - you could also you marshmallow root powder.
2 tbsp slippery elm powder (Ulmus rubra)
100 ml just-boiled or 80 water (allows for evaporation/straining loss down to the 84 ml needed)
Gelatin
14 g gelatin (about 3 sheets, or unflavoured powder)
84 ml marshmallow root & slippery elm infusion (cooled to warm), to bloom the gelatin
Sugar syrup
120 g sugar
100g of water
Meringue base
2 large egg whites (approx. 60–70 g), room temperature
Flavouring
1 tsp vanilla bean paste or extract
Dusted coating
Arrowroot flour or cornstarch
Method
Make the infusion. Pour the just-boiled water over the marshmallow root and slippery elm powder. Cover and steep for 15–20 minutes — longer than a normal tea, to pull the mucilage fully out of the root. Strain through a fine sieve or muslin, pressing the plant matter to extract as much of the gel-like liquid as possible. Let it cool to lukewarm. You should end up with roughly 84 ml of a slightly viscous, cloudy liquid — that texture is exactly what you want; it's the mucilage doing its job.
Bloom the gelatin. Sprinkle the gelatin over the 84 ml of cooled infusion. Let it sit for 5–10 minutes to fully absorb the liquid.
Cook the sugar syrup. Combine the sugar, water in a saucepan over medium heat. Attach a candy thermometer and heat to 240–265°F (115–130°C), depending on how firm you want the final texture — lower end for a softer marshmallow, higher for a firmer set. I have also winged this before and it turned out fine, just make sure its a syrupy consistency.
Whip the egg whites. While the syrup is coming up to temperature, whip the room-temperature egg whites in a stand mixer fitted with the whisk attachment on medium-high until soft peaks form.
Melt in the gelatin. Gently warm the bloomed gelatin (a few seconds in the microwave or over a bain-marie) until fluid, then stream it into the whipping egg whites.
Add the hot syrup. Once the sugar syrup hits temperature, pour it in a slow, steady stream down the side of the mixer bowl with the mixer running on medium. Add the vanilla, then increase to high speed and whip for 8–12 minutes, until the mixture is thick, glossy and only just warm to the touch.
If you are choosing to use marshmallow root powder you can add the powder at this point, I often just add the slippery elm direct at this point too.
Set. Pour into a lined and lightly oiled tin. Leave uncovered at room temperature for at least 4 hours, or overnight, to set and dry slightly.
Cut and dust. Turn out, cut into squares with an oiled knife or scissors, and toss in the powdered sugar and cornstarch mix to stop them sticking.
The plants behind the recipe
Marshmallow root — Althaea officinalis
Actions: demulcent, emollient, anti-inflammatory, vulnerary, mild expectorant
Marshmallow root's defining feature is mucilage — a complex carbohydrate that turns gluey when hydrated, which is exactly what you saw happen when you strained the infusion. That mucilage is the reason the plant has been used for centuries to coat and soothe irritated tissue, both internally and on the skin.
Digestive tract: used traditionally to soothe reflux, gastritis and general GI inflammation by forming a protective, coating layer over the mucous membranes.
Respiratory tract: the same demulcent action is applied to dry, irritated coughs and sore throats, where it soothes rather than suppresses.
Skin: used topically for its emollient and vulnerary (wound-healing) properties, in poultices for irritated or inflamed skin.
Urinary tract: occasionally used for its soothing effect on irritated bladder tissue.
A practical note: because mucilage physically coats surfaces, marshmallow root can slow the absorption of other medications or supplements taken at the same time — it's generally advised to space it a couple of hours away from other oral medicines.
Slippery elm — Ulmus rubra
Actions: demulcent, emollient, nutritive, mild anti-tussive
Slippery elm is the inner bark of the red elm, and it works on the same principle as marshmallow root — high mucilage content — but it's traditionally regarded as more nutritive and slightly more targeted at the gut.
Digestive tract: a mainstay demulcent for reflux, gastritis, IBS-type symptoms and generally irritated or inflamed digestive lining. Historically it was also used as a food itself ("Indian flour") for people who couldn't tolerate much else, which speaks to how gentle and nourishing it's considered.
Respiratory tract: used for dry coughs and sore throats in the same way as marshmallow root, often blended with it.
Topically: made into a paste for drawing and soothing boils, wounds and skin irritation.
Like marshmallow root, slippery elm's coating action means it should be taken away from other medications to avoid interfering with absorption.
Why this combination works
Marshmallow root and slippery elm are two of the most commonly paired demulcents in herbal practice — both mucilaginous, both used for the same broad category of irritated-tissue complaints, and both mild enough to combine without one overpowering the other. Turning them into an actual guimauve isn't just a novelty; it's a functional way to deliver a concentrated dose of soothing mucilage in a form people will actually enjoy, rather than choking down a bitter tea. This is why I love marshmallows and gummies they are the perfect carrier for herbal medicine, especially for the kiddos.
