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Whole-bean mushroom coffee for people who grind their own

Fair-trade single-origin dark roast beans with Lion’s Mane and Chaga.

This is the one for the espresso crowd. Four Sigmatic’s whole-bean dark roast is fair-trade, single-origin Honduran coffee with 250mg each of organic Lion’s Mane and Chaga per serving — grind it fresh for espresso, pour-over or cafetiere, exactly as you would any specialty bean.

£23.88
Fast, FREE UK delivery on all orders £30 or more. Orders under £30 pay a flat £3.49 delivery.

Whole-bean mushroom coffee for people who grind fresh and pull their own espresso. Low-acid and smooth, 340g per bag — grind for espresso, pour-over or cafetiere.

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Whole bean dark roastWhole bean dark roast, 340g.
250mg organic Lion's250mg organic Lion's Mane per serving.
250mg wild-harvested250mg wild-harvested organic Chaga per serving.
Fair-trade single-originFair-trade single-origin beans from Honduras.

Four Sigmatic Dark Roast Whole Bean Coffee

For the coffee obsessive, ground is a compromise and instant is unthinkable — the ritual starts at the grinder. Four Sigmatic’s whole-bean mushroom coffee is the only bag on this shelf that lets you grind fresh, so espresso fans and pour-over devotees can bring functional mushrooms into a routine they refuse to change.

The beans deserve the grinder. It’s a full-bodied dark roast of fair-trade, specialty-grade, single-origin coffee grown at altitude in Honduras, which brews low-acid and smooth. Into each serving go 250mg of organic Lion’s Mane and 250mg of wild-harvested organic Chaga, from fruiting bodies rather than the grain-grown mycelium many cheaper blends rely on.

Because it’s whole bean, it stays fresher longer and gives you full control — fine for espresso, medium for pour-over, coarse for a cafetiere. Four Sigmatic effectively invented mushroom coffee, and this is the format for the person who takes their coffee most seriously. A 340g bag brews like the specialty beans it is, with the Lion’s Mane and Chaga along for the ride.

Specifications

BrandFour Sigmatic
FormatWhole bean
Pack size340g bag
Functional mushroomsLion's Mane, Chaga
CaffeineCaffeinated (single-origin Honduras)
RoastDark
TasteFull-bodied dark roast, low acid
Item FormWhole Bean
Coffee TypeWhole bean
Special IngredientsLion's Mane, Chaga
Suitable forVegan

Four Sigmatic Dark Roast Whole Bean Coffee

£23.88

Free UK delivery · easy returns · secure checkout

Frequently Asked Questions

Do I need a grinder?

Yes — these are whole beans, so you grind them fresh at home. That is the appeal: you get full control over the grind for espresso, pour-over or cafetiere, and the coffee stays fresher than pre-ground.

How is it different from the ground Four Sigmatic coffee?

Same single-origin Honduran dark roast and the same 250mg each of Lion’s Mane and Chaga, but as whole beans rather than pre-ground. Choose this if you own a grinder and especially if you make espresso.

What grind should I use?

Fine for espresso, medium for pour-over or filter, and coarse for a cafetiere. Being a low-acid dark roast, it is forgiving and smooth across all three.

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.

Grinding your own: getting espresso and pour-over right with mushroom beans

5 min read Forage & Brew

If you own a grinder, you already know the difference fresh grinding makes — and you probably won't go back. This is the mushroom coffee for you: whole beans, so the functional side finally fits a routine that starts at the grinder rather than the kettle.

Why whole bean beats pre-ground

Coffee starts losing aroma the moment it's ground — the surface area that makes it brew also lets it stale. Whole beans stay fresher for weeks, and grinding to order means every cup is at its peak. For a dark roast with mushrooms folded in, that freshness keeps the cup clean rather than dull.

Dialling in the grind

One bag, three very different cups:

  • Espresso — fine grind. Aim for a 25-30 second shot; adjust finer if it runs fast, coarser if it chokes. The low acidity makes it a forgiving espresso bean.
  • Pour-over / filter — medium grind. Cleaner and brighter; great for tasting the coffee under the mushrooms.
  • Cafetiere — coarse grind. Fullest body, four-minute steep, slow plunge.

Freshness housekeeping

  • Buy or borrow a burr grinder if you can — blade grinders are uneven and heat the beans.
  • Store beans in an airtight container away from light and heat, and grind just before brewing.
  • Don't freeze small amounts repeatedly; condensation is the enemy.

The mushrooms, unchanged by the format

Whether ground or whole bean, the functional content is the same: 250mg each of Lion's Mane and Chaga per serving, from fruiting bodies. Grinding your own doesn't change what the mushrooms do — it just means the coffee wrapped around them is as good as your kit can make it. For a serious home barista, that's the whole point.

Browse all ground & whole bean

Grind your own coffee?

This is the only whole-bean mushroom coffee on our shelf — fair-trade, single-origin, and yours to grind. Dial it in for espresso and enjoy the mushrooms for free.

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

Page summary

Four Sigmatic Dark Roast Whole Bean Coffee is a whole-bean mushroom coffee: a full-bodied, low-acid dark roast from fair-trade, single-origin Honduran beans, with 250mg organic Lion’s Mane and 250mg wild-harvested Chaga per serving, using fruiting-body extracts. Grind fresh for espresso, pour-over or cafetiere. 340g bag. Retail price at Forage & Brew is derived from cost.

Four Sigmatic Dark Roast Whole Bean Coffee £23.88