Your bag

Spend £50 for free standard UK delivery

Free shipping rules

  • £50 minimum for free standard UK delivery after discounts.
  • £30 minimum for verified Beta, Delta, Sigma and Omega members after discounts.
  • Discounts, including rewards redeemed with points, can move your bag below the minimum.
  • Your delivery address and available methods are confirmed at checkout.

Your bag is empty.

Explore freshly roasted coffees from independent roasters.

Shop all coffee

Everyday brewing essentials

  • Cafec Filter Papers 100 Pack

  • V60 Paper Filters - Timemore

  • Aeropress Filter Papers (350 Pack)

    Genuine Aeropress standard filter papers, pack of 350.Compatible for Aeropress Original, Aeropress Go, Aeropress ClearMicro-filtered paper produces a smooth, sediment-free cup with every brew.

  • Lotus Water Drops

    Brewing the perfect cup of coffee starts with the right water, and Lotus Water Drops make it effortless to fine-tune your water chemistry for...

  • APAX Lab - Single Bottles

  • ZeroWater - Replacement Filters

Expanded coffee image

Onyx Coffee

Ratnagiri Estate Thermal Shock Catuai | India

£24.00

  • Chocolate Cookie, Peach, Hibiscus, Winey
Roast
Size
Roast Date

Only 3 left!

In-stock orders placed before 12pm dispatch the same working day.

Rapid insured delivery

Additional information

Coffee Details

Country of Origin
India
Region
Chikmagalur
Varietal
Catuai
Process
Thermal shock
Roast Level
Medium-Light
Farm
Ratnagiri Estate
Altitude
1340 masl

What to expect

In the cup you can find

Chocolate Cookie, Peach, Hibiscus, Winey

Overall profile

Balanced & clean with a notable complexity due to the thermal shock processing, effortlessly interesting.

Sensory profile

Acidity
2/5
Body
3/5
Sweetness
3/5
Funk
2/3
Adventurous
3/5

About Onyx Coffee

Founded in Northwest Arkansas, Onyx Coffee Lab approaches sourcing, roasting and hospitality with meticulous care. Its team combines transparent coffee buying, competition-level expertise and thoughtful presentation to make every stage from producer to cup visible and intentional.

Shop all Onyx coffees

Roaster notes

India — Ashok Patre Ratnagiri Estate Catuaí (Thermal-Shock)

Tastes Like — 🌺 Hibiscus • 🍑 Peach • 🍷 Winey • 🍪 Chocolate Cookie

DETAILS

  • Producer: Ashok Patre
  • Farm: Ratnagiri Estate
  • Region: Chikmagalur, India
  • Varietal: Catuaí
  • Process: Thermal-Shock, Raised-Bed Dried
  • Elevation: 1,340 masl
  • Harvest: December
  • Cup Score: 86.5

INTRO
Located in the rolling hills of Chikmagalur, Ratnagiri Estate is one of the premiere coffee estates producing specialty coffee in India. Within its gates, Ashok Patre strives to develop processing methods that exceed the expectations of coffees from India. Hibiscus and peach lead, with a winey complexity and a chocolate cookie finish — exceedingly balanced and clean, reflected in this inaugural offering from India. In the cup: hibiscus, peach, winey, and chocolate cookie.

THE PRODUCER
First met in Chicago at a forum on post-harvest processing, Ashok Patre has taken a different path from the intensely fruit-forward carbonic maceration trend, instead developing methods that preserve the integrity of India's native varieties and express his specific soils and microclimate. His approach is both methodical and visionary — with a deep understanding of Indian terroir and its varietal limitations, he's engineered fermentation protocols that shape flavour with intention and precision. Over the past year, he partnered with a leading food scientist to design custom, purpose-built fermentation equipment, giving his facility near-total control over fermentation parameters. At its heart is a small team of specialists, including two microbiologists (one with a PhD), who monitor microbial populations, plate cultures, and conduct titratable acidity testing to make data-driven decisions on batch completion — a meticulous, science-led process more akin to enology or craft brewing than conventional coffee production. This sourcing partnership was established through Osito Coffee.

THE PROCESS
This coffee undergoes a mixed oxidation four-day fermentation, followed by depulping and channel washing. The steps include a sixty-hour tank fermentation, along with an additional long fermentation within a sealed, pressurised tank with inoculates. The parchment then dries for approximately sixteen days on patios.

The data-driven, microbiologist-monitored fermentation is the defining step — it's what builds the fruit-forward complexity behind the hibiscus and peach character while keeping the cup clean and balanced rather than muddied by over-processing.

THE CUP
Balanced and clean, with noticeable fermentation-driven complexity — hibiscus and peach lead, with a winey depth and a chocolate cookie finish.

Flavour Notes
🌺 Hibiscus 🍑 Peach 🍷 Winey 🍪 Chocolate Cookie

Explore more coffees

  • Manhattan Coffee Roasters - Manhattan Roasters - Brooklyn

    Cream • Candied Orange • Praline

  • DAK Coffee Roasters - Milky Cake | Colombia

    Cardamom • Pistachio • Vanilla Cake

  • April Coffee Roasters - Costa Rica - Sustainable Profile Coffee

    Milk Chocolate • Brown Sugar • Red Cherries

  • Native - Alex Bermudez | Finca El Paraiso - Cinnamon Leche

    Cinnamon • Horchata • Apple

  • Onyx Coffee - Southern Weather

    Milk Chocolate • Plum • Candied Walnuts

  • Manhattan Coffee Roasters - Manhattan Roasters - Colombia Viani

    Stonefruit • Cocoa • Grape

Fresh roast alerts

Hear when a fresh batch of Ratnagiri Estate Thermal Shock Catuai | India arrives.

This alert is only for this product and is separate from marketing emails. No extra email confirmation is needed.

Country of Origin

India, Asia

In this coffee

Balanced & clean with a notable complexity due to the thermal shock processing, effortlessly interesting.

  • Chocolate Cookie
  • Peach
  • Hibiscus
  • Winey

About this origin India grows both Arabica and Robusta, chiefly beneath mixed shade in the Western and Eastern Ghats. Regional climates, intercrops and methods range widely, including washed and natural lots and the distinctive coastal practice used to make monsooned coffee.

Explore all coffees

Coffee Process

Thermal Shock

In this coffee

Balanced & clean with a notable complexity due to the thermal shock processing, effortlessly interesting.

  • Chocolate Cookie
  • Peach
  • Hibiscus
  • Winey

How it works Producers use “Thermal Shock” for different temperature-change recipes during or after fermentation. The producer’s own process details should explain the temperatures, timing and stage used.

Typical influence The method can influence aroma and flavour, but there is no single Thermal Shock recipe or guaranteed cup profile. This coffee’s own tasting notes are the best guide.

Explore all coffees

Coffee Variety

In this coffee

Balanced & clean with a notable complexity due to the thermal shock processing, effortlessly interesting.

  • Chocolate Cookie
  • Peach
  • Hibiscus
  • Winey

About this variety

Catuaí is usually an approachable, balanced variety rather than an extreme one. Expect gentle fruit, sweetness and a rounded finish, with the origin and process doing much of the detailed flavour work.

Why this one is different
  • India
  • Chikmagalur
  • 1340 masl
  • Thermal shock

This Catuaí is from India, where local selections, farming conditions and processing shape its final character.

Thermal Shock covers producer-specific temperature steps. It can influence the cup, so this coffee’s own tasting notes are more reliable than a general variety stereotype.

A little background

Catuaí is a compact cultivar developed in Brazil by crossing productive Mundo Novo with compact Caturra. Red and yellow fruiting selections are grown in Brazil and parts of Central America.

Classification Brazilian cultivar

Technical lineage Mundo Novo × Caturra.

Variety is a guide, not a flavour guarantee. Lot notes are more specific.

Explore all coffees

Remove favourite?

Removing a favourite won’t count as a dislike.

Save your next favourite

Keep the products you love together, ready for your next visit.