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Real ground coffee for your cafetiere, with Lion’s Mane and Chaga

Single-origin Honduran dark roast, brewed the way you already brew.

Four Sigmatic is the original mushroom-coffee name, and this is its ground dark roast: specialty single-origin beans from Honduras with 250mg each of organic Lion’s Mane and Chaga per serving, using fruiting bodies rather than mycelium. Brew it in whatever you own.

£37.49
Fast, FREE UK delivery on all orders £30 or more. Orders under £30 pay a flat £3.49 delivery.

A genuine ground coffee — not an instant — for your cafetiere, filter or moka pot. Low-acid and smooth, 340g per bag, from the brand that pioneered mushroom coffee.

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Dark roast ground coffeeDark roast ground coffee, 340g.
250mg organic Lion's250mg organic Lion's Mane per serving.
250mg wild-harvested250mg wild-harvested organic Chaga per serving.
Single-origin beans fromSingle-origin beans from Honduras.

Four Sigmatic Ground Mushroom Coffee

This is the option for people who never wanted to give up brewing. Four Sigmatic’s ground mushroom coffee is real ground coffee you make in a cafetiere, filter machine or moka pot — not a just-add-water powder — so nothing about your morning routine has to change except what’s in the bag.

The coffee itself is worth the shelf space: a full-bodied dark roast from specialty-grade, single-origin beans grown at altitude in the Marcala region of Honduras, which brews low-acid and smooth. Into it go 250mg of organic Lion’s Mane and 250mg of wild-harvested organic Chaga per serving, and Four Sigmatic is pointed about using the mushrooms’ fruiting bodies, which it says carry far more active content than the mycelium many cheaper blends rely on.

As the brand that arguably invented the category, Four Sigmatic has had years to get the balance right, and the mushrooms genuinely disappear into a proper dark roast. A 340g bag brews like any good ground coffee, which makes this the natural pick for a household that already owns a cafetiere and takes its coffee seriously.

Specifications

BrandFour Sigmatic
FormatGround coffee
Pack size340g bag
Functional mushroomsLion's Mane, Chaga
CaffeineCaffeinated (single-origin Honduras)
RoastDark
TasteFull-bodied dark roast, low acid
Item FormGround
Coffee TypeGround coffee
Special IngredientsOrganic Lion's Mane, Organic Chaga
Suitable forGluten Free, Keto, Vegan

Four Sigmatic Ground Mushroom Coffee

£37.49

Free UK delivery · easy returns · secure checkout

Frequently Asked Questions

Is this instant or real ground coffee?

Real ground coffee. You brew it in a cafetiere, filter machine, moka pot or drip — anything you’d use for normal ground coffee. It is not a just-add-water powder.

What does "fruiting bodies, not mycelium" mean?

The fruiting body is the mushroom itself; mycelium is the root-like network often grown on grain. Four Sigmatic uses fruiting bodies, which it says contain far more active content, so you get more mushroom per milligram.

Will it taste earthy?

No — it is a full-bodied, low-acid dark roast from single-origin Honduran beans, and the 250mg each of Lion’s Mane and Chaga blend in without an earthy note.

How is it delivered and what does postage cost?

We ship across the UK. Delivery is free on orders over the qualifying value shown at checkout, with a small flat rate on smaller orders. Your delivery estimate is shown before you pay.

Can I return it if I change my mind?

Yes. If an unopened pack is not right for you, return it under our returns policy for a refund or exchange. If anything arrives damaged, contact us and we will put it right.

Is checkout secure?

Card payments are handled on Stripe or PayPal's own hosted pages, so your card details never touch our website.

Brewing ground mushroom coffee: cafetiere, filter and moka compared

5 min read Forage & Brew

Most mushroom coffee is instant because it's convenient. This one is ground because some people would rather brew a proper cup and simply add the functional side. If that's you, the brewing method changes the result more than the mushrooms do — so here's how to get the best from the bag.

Match the grind to the method

This comes ground for everyday brewers. It shines in:

  • Cafetiere (French press). The most forgiving method and arguably the best match for a dark roast — full body, four minutes, plunge slowly.
  • Filter / drip. Cleaner, lighter in the cup; great if you find dark roast heavy.
  • Moka pot. Intense and espresso-like; use it if you take milk.

Why the dark roast and low acidity help

Single-origin Honduran beans grown at altitude tend to be low in acid, and a dark roast smooths them further. That matters for a mushroom coffee: a harsh, acidic base would fight the earthy notes, whereas a rounded dark roast absorbs them completely.

Fruiting body vs mycelium, in plain terms

Four Sigmatic makes a point of using fruiting bodies — the actual mushroom — rather than mycelium grown on grain. For you as a drinker, the practical upshot is more genuine mushroom content per serving and less grain filler. It's the sort of detail that separates the specialist blends from the bulk ones.

Storing ground coffee properly

Ground coffee stales faster than beans, so treat this bag with a little care:

  • Keep it sealed, cool and away from light — not in the fridge.
  • Buy a grinder later if you get hooked; until then, use it within a few weeks of opening.
  • Don't store it above the kettle; heat and steam are the enemy.

Brew it like the good ground coffee it is, and the Lion's Mane and Chaga come along for free.

Browse all ground & whole bean

Not ready to give up brewing?

This is real ground coffee for the kit you already own. If you take your morning cup seriously, Four Sigmatic’s dark roast is the mushroom coffee that respects it.

Still deciding? Ask us a question and we'll help you choose.

Page summary

Four Sigmatic Ground Mushroom Coffee is a real ground coffee (not instant) for cafetiere, filter or moka. It is a full-bodied, low-acid dark roast from single-origin Honduran beans, with 250mg organic Lion’s Mane and 250mg wild-harvested Chaga per serving, using fruiting-body extracts. 340g bag. Retail price at Forage & Brew is derived from cost.

Four Sigmatic Ground Mushroom Coffee £37.49