flavour and caffeine
Roast Levels Explained: How Coffee Roasting Impacts Flavour & Caffeine

Whether you’re a casual coffee drinker or a devoted aficionado, understanding roast levels is key to choosing the perfect cup. At Dwyfor, we roast our coffees with precision and care, offering a range of artisan blends that cater to every taste. But what exactly do terms like “light roast” or “dark roast” mean? And how do they affect flavour and caffeine?

Let’s break it down.

What Are Coffee Roast Levels?

Roast level refers to how long and how hot coffee beans are roasted. This process transforms green coffee beans into the richly coloured, aromatic beans you know and love.

The main roast levels are:

  • Light Roast
  • Medium Roast
  • Dark Roast

Each roast offers a different flavour profile, aroma, body, and caffeine content.

Light Roast:
Bright, Fruity & Higher in Caffeine

Lightly roasted beans are roasted for the shortest amount of time, typically until just after the first crack (when the bean splits slightly from internal pressure).

Flavour:

  • Bright and acidic
  • Fruity, floral, and tea-like notes
  • Preserves more of the bean’s original origin flavour

Caffeine Content:

  • Contrary to popular belief, light roasts retain more caffeine by volume than darker roasts. This is because roasting breaks down caffeine slightly, and light-roasted beans are denser.

Pairs Well With:

  • Filter coffee methods like pour-over or French press

Medium Roast:
Balanced, Smooth & Popular

Medium roasts are heated longer than light roasts but removed before they reach a dark, oily stage.

Flavour:

  • Balanced acidity and body
  • Rich, slightly sweet and nutty
  • Hints of caramel or chocolate often emerge

Caffeine Content:

  • Slightly less caffeine than light roasts but still relatively high

Pairs Well With:

  • Most brewing methods, including drip and espresso

Try This: Explore Dwyfor’s Medium Roast Artisan Coffees

Dark Roast:
Bold, Rich & Lower in Caffeine

Dark roasts are roasted the longest, often until the second crack, which gives the beans a dark brown colour and sometimes a shiny surface from released oils.

Flavour:

  • Bold, smoky, and deep
  • Less acidic, with chocolate, roasted nut, and spice notes
  • Original origin flavours are largely replaced by roast-driven flavours

Caffeine Content:

  • Slightly lower caffeine than lighter roasts due to longer roasting time and lower bean density

Pairs Well With:

  • Espresso and strong brews

Try This: Shop Dwyfor’s Dark Roasted Coffees

Does Roast Level Affect Strength?

In a way—flavour strength and caffeine strength aren’t the same.

  • Dark roasts taste stronger and more bitter, but that doesn’t mean they contain more caffeine.
  • Light roasts may taste lighter but can deliver a bigger caffeine hit per scoop.

Choosing the Right Roast for You

There’s no right or wrong—it all comes down to your preference:

  • Want something smooth and rich? Go medium.
  • Craving bold and intense? Try a dark roast.
  • After something vibrant and punchy? Light roast is for you.

Dwyfor: Roasted in Wales, Enjoyed Everywhere

At Dwyfor, our coffee beans are small-batch roasted in Wales with attention to detail and tradition. Whether you love a bold espresso or a mellow breakfast brew, you’ll find your ideal roast in our artisan coffee range.

👉 Browse All Coffees at Dwyfor

Great coffee starts with the roast—taste the difference in every cup.