About Us - Our Family - Cornish Dairy Co Cornwall

Trewithen Dairy is now Cornish Dairy Co!

Cornish Dairy Co

We know our craft and we keep it honest. No fuss, just made with loving care.

Our History

It’s taken lots of experience, along with plenty of hard work and patience, to build the business and to produce the delicious dairy products that are at the heart of everything we do.

1976

The Clarke family start farming at Greymare Farm in the Glynn Valley.

1994

The Clarke family started crafting dairy products there in March 1994.

1994-2000

In the early days the Clarkes had their own herd. Bill and Rachel would bottle the milk once the children were in bed and deliver it early the next morning.

1994-2000

They cooked the clotted cream themselves, in open trays and potted it by hand. Their customers loved all of the Cornish dairy goodness and soon the Clarkes were supplying more and more happy customers.

2001

By 2001 the milk bottling and cream making side of the business had become so successful that a big decision had to be made. To continue dairy farming or switch completely over to processing milk.

2001

It wasn’t an easy decision, but the family sold their herd and moved full time into producing milk, cream and, more recently, butter and yoghurt.

2001-2023

Son Francis now has a key role as Director in the business working alongside a talented and committed management team.

2024

The Clarke family sold the business in June 2024 to the Ehrmann group, an independent 3rd Generation family-owned business, which is one of Germany’s leading dairy companies. Moving forward it will be very much business as usual.

2026

Trewithen Dairy evolves into Cornish Dairy Co. A name synonymous with quality, care and local Cornish products.

What makes Cornish Dairy Co so special?

Tin Mine

A Cornish business

We are a proud local employer with over 260 employees.

Windmill

We do the right thing

We believe in doing the right thing for people, customers and planet.

Cow

Local milk from local herds

We use local milk from local herds in the heart of Cornwall.

Tractor

Proud to be Cornish

We are proud of the Cornish provenance of our dairy products.

Discover our proper moreish products

Cornish Cream

Our indulgent, award winning cream is as fresh and as natural as it is unbelievably creamy and rich.

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Cornish Milk

Our delicious milk comes fresh from local Cornish farms, where cows graze on lush pastures and are cared for to high welfare standards. The result? Naturally wholesome milk that tastes just as good in your tea as it does by the glass.

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Cornish Butter

Our creamy butter is as deliciously rich as it looks. We’re not sure if it’s the luxuriously smooth texture, the buttercup yellow colour, the rich flavour or the fact that it’s churned using Cornish cream that makes it so special.

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Cornish Yoghurt

Our indulgent yoghurts are bio live and a source of protein. Thick, rich and creamy with a distinctively luxurious taste, Greek style has never been so simply delicious. Drizzle with honey, top with granola or pair with your favourite fruit.

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Our farmers

At Cornish Dairy Co, we and our farmers are passionate about the health and welfare of the cows that produce the essential ingredient in all our great tasting dairy products – high quality, Cornish milk. The dairy farms that are contracted to supply Cornish Dairy Co are all located within 25 miles of the dairy and we take great pride in the fact that we know each one of our farmers personally.

Although no two Cornish Dairy Co farms are the same, all our farmers share a common set of values and comply with a comprehensive set of standards that ensure high levels of animal health, welfare and husbandry. We are caretakers of the land; we and our farmers recognise the need to look after the environment for future generations.

Gurnsey cow on the field

Our cows

The farms which supply milk to us at Cornish Dairy Co, have a range of breeds in their herds, including Jersey, Guernsey, Holstein, Friesian, Brown Swiss and Ayrshire.

Work with us

At Cornish Dairy Co, we thrive on a collaborative culture where every team member plays a crucial role in us creating the highest quality products. If you’d like to join us, find out more about our current opportunities.