Maryland cottage food business · Sold in Maryland only · Local pickup & market stall, no shipping
CLOPPER MILL

Clopper Mill

Coffee Roasters · Gaithersburg, MD

Whole bean coffee, roasted to order. Every price shows exactly what the green coffee cost and where it came from.

See the coffeesGet a free 80g sample

What we stand behind

  • Whole bean only

    No pre-ground coffee. Grind right before you brew and you'll taste the difference.

  • Roasted to order

    Nothing sits on a shelf. Pick your roast level, from City to Full City+, and your coffee is roasted for you.

  • Open books

    Each coffee links to its source lot, and each price shows the green cost and the formula behind it.

On the menu

The coffees

All green coffee is bought from Sweet Maria's in Oakland, CA. Tasting notes, scores and specs are theirs, with a link to each lot.

Ethiopia · Natural

Birbirsa

$11.93
151g green · ≈ 124g–129g roasted

Red honey, pear, peach, Earl Grey tea, cocoa bittersweets (especially in dark roasts).

Region
Beshasha Badiya, Jimma
Producer
Birbirsa cooperative
Varieties
Heirloom
Arrival · Score
Aug 2026 · 90.9
Roast level · net weight · suggested range in gold
  • City · ≈ 129g (suggested)
  • City+ · ≈ 127g (suggested)
  • Full City · ≈ 125g (suggested)
  • Full City+ · ≈ 124g (suggested)
Green $8.95/lb ÷ 3 batches = $2.98 per batch · × 4 = $11.93Source lot ↗ (opens Sweet Maria's in a new tab)
Ethiopia · Natural

Kercha Haruse

$12.87
151g green · ≈ 124g–129g roasted

Light and bright for a natural: citron, yuzu, mandarin, lightly floral, fragrant black tea.

Region
Kercha, Guji
Producer
Kercha Washing Station
Varieties
Heirloom
Arrival · Score
Jul 2026 · 92.6
Roast level · net weight · suggested range in gold
  • City · ≈ 129g (suggested)
  • City+ · ≈ 127g (suggested)
  • Full City · ≈ 125g
  • Full City+ · ≈ 124g
Green $9.65/lb ÷ 3 batches = $3.22 per batch · × 4 = $12.87Source lot ↗ (opens Sweet Maria's in a new tab)
Mexico · Washed

Tenejapa Valle de Jovel

$10.73
151g green · ≈ 124g–129g roasted

Unrefined sugars, hefty cocoa, loose-leaf tea and walnut, hints of apple and smoked chocolate.

Region
Tenejapa, Chiapas
Producer
Tenejapa growers
Varieties
Caturra, Costa Rica, Marsellesa, Typica
Arrival · Score
Sep 2026 · 86.8
Roast level · net weight · suggested range in gold
  • City · ≈ 129g (suggested)
  • City+ · ≈ 127g (suggested)
  • Full City · ≈ 125g (suggested)
  • Full City+ · ≈ 124g (suggested)
Green $8.05/lb ÷ 3 batches = $2.68 per batch · × 4 = $10.73Source lot ↗ (opens Sweet Maria's in a new tab)
Guatemala · Washed

Huehuetenango Boqueroncito

$13.13
151g green · ≈ 124g–129g roasted

Creamy caramel and unrefined sugars, bright apple, cinnamon-laced cocoa, dark chocolate at darker roasts.

Region
La Libertad, Huehuetenango
Producer
Aurelio Villatoro
Varieties
Bourbon, Caturra
Arrival · Score
Aug 2026 · 88.0
Roast level · net weight · suggested range in gold
  • City · ≈ 129g (suggested)
  • City+ · ≈ 127g (suggested)
  • Full City · ≈ 125g (suggested)
  • Full City+ · ≈ 124g (suggested)
Green $9.85/lb ÷ 3 batches = $3.28 per batch · × 4 = $13.13Source lot ↗ (opens Sweet Maria's in a new tab)

Green prices are Sweet Maria's 1 lb prices as listed on Oct 20, 2026. If a green price changes, the bag price changes with it.

How pricing works

One pound, three batches, one formula

Every coffee is priced the same way. No hidden margins, no "premium" markups.

  1. 01

    1 lb of green

    Start with one pound of green coffee at the price Sweet Maria's charges.

  2. 02

    Split into 3

    The pound is weighed out into 3 small batches of 151.2g green, one batch per order.

  3. 03

    Roasted your way

    Your batch is roasted to the level you choose. Roasting drives off water, so it loses about 15–18% of its weight, more at darker roasts. That's roughly 124g–129g in the bag, and the exact net weight is printed on the label.

  4. 04

    Cost × 4

    Each batch costs 4 times its share of the green. That covers everything else: roasting, bags, labels and time.

Worked example · Birbirsa$8.95 green ÷ 3 = $2.98 per batch × 4 = $11.93 a bag

Custom order · 151g batch

Your coffee, any origin

Have an origin in mind that isn't on the menu? Tell me, and I'll source it and roast a 151g batch at the level you choose, City to Full City+. You'll get a quote before anything is roasted.

Custom requests open alongside pickup.

Roast levels

City to Full City+

Typical weight loss and net weight from a 151.2g green batch:

City~15% · ≈ 129g
Lightest we offer. Brightest acidity, most origin character.
City+~16% · ≈ 127g
A touch more development. Sweetness rounds out the acidity.
Full City~17% · ≈ 125g
Medium. Fuller body, caramel and cocoa begin to lead.
Full City+~18% · ≈ 124g
Darkest we offer. Bittersweet chocolate and heavy body, often good for espresso.

Getting your coffee

Pick up locally

We don't ship. Coffee is sold in person, in Maryland, under the state's cottage food law (details below).

To be announced

Weekly pickup

Set pickup locations on a regular weekly schedule. Order ahead, and your coffee is roasted that week.

Locations: TBA · Schedule: TBA

To be announced

Mobile stall

Find us at a market stall somewhere in Montgomery County. Come by to taste, talk origins and pick up a bag.

Location: TBA · Days: TBA

Pickup spots and the stall schedule will be posted here once they're confirmed.

Try before you buy

A free 80g sample

Pick a coffee and a roast level. We'll roast 80g for you, free, for pickup once locations open. Sign-ups open alongside pickup.

Pickup in Maryland only. No shipping.

The name

Named for the mill

Clopper Mill takes its name from the old grist mill on Great Seneca Creek, where local harvests were once ground by the turn of a water wheel. Same idea here: good raw material, steady hands, nothing hidden.

Maryland cottage food law

Why we don't ship (yet)

Clopper Mill operates as a Maryland cottage food business, roasting in a home kitchen. Cottage foods can only be sold within Maryland, so for now all sales are in person: local pickup and our Montgomery County stall. Shipping will come once we roast in a licensed facility.

Made by a cottage food business that is not subject to Maryland's food safety regulations.