What’s the difference between Light and Dark Roast Coffee?

Coffee is not just a beverage. It is an art, a culture, an economy, and a passion.

Before your beans are mixed into the beverage, it goes through a roasting process. Roasting turns coffee into those dark, brown, aromatic beans you love. It is a process that impacts coffee’s flavour, taste, body and complexity.

For coffee lovers, the difference between light and dark roast is more than just a taste preference. A perfect roast is a personal choice that is often dominated by geographical location.

We know that choosing the perfect roast can be confusing. So we have prepared this guide on light roast vs. dark roast taste to answer all your queries.

What to know about pre-roasted coffee/ The Roasting Processes

We appreciate the science of roasting coffee. Roasting brings out the aroma and flavor locked inside the raw coffee beans.

Raw coffee beans are green and nothing like the roasted ones. They smell grassy and are soft and spongy. They are denser than the roasted beans because the moisture is still intact before the roasting process.

Roasting causes chemical changes in the beans. Coffee beans begin to darken as they absorb heat, whereas the hues differ depending on regions. The caffeine level in the beans also changes after roasting.

The three most common coffee roasts are referred to as light, medium and dark. They are roasted at different temperatures for a different time.

A freshly roasted batch contains the best flavors. Brew those crunchy beans while they are new and fresh.

Different Types of Roast Coffee

The varied options of beans in the market can be confusing. They often go by names such as French, Italian and City. Here you will find the three most common roasts.

  • light roast
  • medium roast
  • dark roast

What is a light roast?

In most coffee shops, light roast coffee beans are used for deep brewing. They are light brown tan in color and have no oil on their surface. They are high in caffeine.

These beans are roasted at a lower temperature of 350-400 degrees Fahrenheit (ca. 204 °C) after the first crack occurs. The beans audibly split with a crackling sound.

Light roast coffee beans have a grassy smell, crispy body, and mellow acidity. This roast brings out the best characteristics in coffee beans more than the other processes.

If you like a thinner beverage, a light roast is the one for you. Light roast goes by the names Light City, New England and Cinnamon Roast.

What is a medium roast?

They rarely have an oily surface, are medium brown, and have a medium acidity. Medium roast coffee tends to have a caramel sweetness.

The beans are roasted till 437-450 degrees Fahrenheit (232.22 °C) till the beginning or middle of the second crack.

Many coffee drinkers prefer it because it has a perfect balance of acidity, aroma and sweetness. It is nice in-between you are looking for.

They are often referred to as Regular Roast, American Roast and Breakfast Roast.

What is a dark roast?

The dark roast comes in a black shade with an oily surface. They taste substantially bitter.

These beans are roasted at a temperature between 460-480 degrees Fahrenheit (ca. 249 degree Celsius). The roasting is concluded after the second crack. The amount of caffeine is less in a dark roast.

Due to more heat exposure, dark roast loses the original flavor of coffee beans.

If you are a fan of a full-bodied and bold beverage, a dark roast is the one for you. It pairs perfectly with milk and heavy cream.

Dark roast is usually designated French Roast, New Orleans Roast, Continental Roast. The aroma of the dark roast will make you reminisce about an old coffee shop at the corner of a road.

Light Roast vs. Dark Roast: The Nitty Gritty

There is a ton of features to unpack to find the roast suiting your taste bud. Here we will break down the key differences between light roast and dark roast.

We have considered its principal features to determine the fundamental differences between light roast and dark roast. Hopefully, this will be enough for you.

So Keep with us.

  • Body & Complexity
  • Flavor
  • Acidity
  • Caffeine Content
  • The Roasting Difference
  • Health Benefits
  • Flavor and Texture

Body & Complexity

Body refers to the physical properties such as texture, mouth-feel and heaviness of coffee. Weight and volume get altered in the roasting process.

Light roasts are brighter in color and have a thinner body. Since they see less heat, they have more moisture.

Dark roasts have a black hue. They have more body due to the caramelized sugar from the beans. Dark roast has a more robust and bold flavor. The beans get thinner in the roasting process.


More heat exposure caramelizes the sugar inside the coffee beans and gives it a bittersweet taste. Since light roast is not cooked for a long time, the original flavors are retained.

Light roast is often preferred for its embodiment of regional and original flavors. They have a sophisticated taste ranging from fruity tang to citrus.

On the other hand, dark roast loses the original beans’ flavor and is masked with roasts’ flavor. They tend to have a bittersweet chocolate flavor.

However, you may notice more differences in light roast vs. dark roast taste by trying these in different beverages such as cappuccino and espresso.


When we talk about the acidity of coffee, we mean the taste profile. Not the PH level.

Lighter roast coffee has the highest acidity. The compounds cannot be broken in less heat exposure. If you like you a punch in your cup, this is the roast for you. However, they can be trouble for your sensitive stomach.

The longer roasting process kills the acidity in the dark roast. Hence, it has fewer chances of upsetting your stomach. This lower acidity makes the dark roast pair perfectly with dairy products.

Caffeine Content

There is a myth of dark roast coffee being more caffeinated. However, the roasting period affects the caffeine content in beans. Light roast has higher caffeine content for shorter cooking time.

On the contrary, the dark roast contains less caffeine. Caffeine is usually burned off in the long roasting process.

However, the roasting process plays a little role in caffeine content change. Caffeine stays chemically stable throughout the process. The changes in density and size of the beans change the caffeine level.

If the need of more caffeine, go for the light roast. For cutting down caffeine, you can always switch to decaf.

The Roasting Difference

The significant difference is the roasting time. Water gets out in through evaporation in roasting. The longer you roast, the darker beans you get. Roasting brings out the complex flavor of the coffee.

Light roast is roasted till the first crack at a comparatively low temperature. Hence, a lighter roast is easier to achieve.

The dark roast is roasted till the end of the second crack for a higher temperature. You need to monitor the temperature to prevent any accidents. Moreover, a burnt bean will not be a fun flavor to drink.

It takes years of training to become a professional in the coffee roast.

Health Benefits

This flavorful beverage comes with a pack of health benefits. It reduces the calcium in your heart, burns body fat, and helps to improve memory.

Both the roasts have something to offer. It is found in research that light roast has higher anti-oxidants compared to its dark counterpart. Light roast gives protection against inflammation and cell damage.

However, light roast for its higher acidity can be a bit troublesome for your stomach. Dark coffee is safe to consume for the ones with a sensitive stomach.

If you are concerned about the nutritional value, pick the light roast.

Flavor and Texture

Light roast has a more dense texture with a fruity herbal flavor. You can find the original taste of beans in this one. If you want more caffeine, this is your best friend.

Dark roast loses a lot of flavors for the longer roasting period. It tastes a bit like nuts and graham crackers. It has a fuller and thicker texture with more oil.

A light roast is used in most coffee shops. On the other hand, a dark roast will remind you of an old barista!

Apart from the change in hue, we can summarize the differences between the two roasts.

  • As the color gets darker, coffee beans lose their original flavors.
  • The caffeine level reduces in higher heat exposure.
  • Light roast is more acidic with a grassy taste.
  • Dark roasts have an oily surface while the light ones are dry.
  • The longer the beans are roasted, the thinner they get.

FAQ about Light and Dark Roast Coffee

We have taken an attempt below to answer the most common queries regarding the coffee roast.

Which one is better? Is light roast better or dark roast? This is a verdict you should give for yourself.

Do you want an original flavorful cup? Are you in need of more caffeine?

Go for the light roasted ones. They tend to have all the flavors intact and higher caffeine content.

Or do you want something thicker? Do you want something to go with milk and cream? Do you prefer a decadent flavor?

Dark roast is your answer. This roast has a thick texture that complements dairy products.

You know what your taste bud wants. Know the differences and get the perfect roast for you.

1.     Which roast is more bitter?

The chlorogenic acid lactones break down into phenylindanes in heat exposure. Phenylindanes produces a bitter taste.

Dark roast is exposed to heat for a longer period. Hence, they tend to taste more bitter than the light one.

However, more factors affect the bitterness of coffee. Coffee and water ratio, temperature, time of brewing, quality of beans, cleanliness of brewing equipment often make the coffee taste more bitter.

Apart from the roast, it would be best if you looked out for other factors to balance your cup’s bitterness.

Which roast is stronger?

Darker roast does not mean stronger coffee. Strong coffee comes from brewing, not roasting.

Light roast has all the original flavors preserved and more caffeine. On the other hand, dark roast loses most of the flavors. It is burned and has less caffeine.

However, the difference in caffeine content is negligible. Roasting does not create much of a difference in caffeine content.

Hence, the lighter one is stronger than, the darker. But then again, you can brew your preferred roast well to get a strong cup.

Do they taste different?

The taste of coffee beans often varies depending on their region. Coffee grown in Italy tastes different from the one in Africa.

No wonder roasting brings out the essence and fragrance of coffee. Light roast coffee contains the original flavors. It has a fruity and citrus taste.

Dark roast loses the original flavor and sometimes tastes a bit like dark chocolate. They have a smoky flavor.

So roasting creates a substantial difference in the taste of the coffee.

What makes medium roast coffee better than the light and the dark one?

Medium roast coffee is an in-between option and still bears a coffee’s natural flavor.

They are less acidic than light roast and have a sweet aftertaste like the dark roast. This one has a balanced aroma, texture and caffeine content. The beans are roasted until the caramelization takes place.

If you want the original taste of beans with a tinge of sweetness, medium roast is the one for you. Its balanced acidity goes easy on your tummy as well.


Coffee lovers orchestrate their mornings to the tune of coffee. A satisfactory cup of coffee kick-starts your day.

However, you do not have to be a coffee aficionado to know your roasting preference. With our helpful light roast vs. dark roast taste guide, you will no longer be walking confused in your grocery store’s aisle.

At the end of the day, it is about flavor, taste and aroma. You can have a lighter roast cup in the early morning and go for the dark one in the evening. Coffee, along with its roasting, is always a personal preference.

Brew your batch and decide for yourself. Enjoy your perfect cup with your preferred roast.

Happy caffeinating!

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