Where did the story of French croissants begin, and what’s the difference between a croissant au beurre and a croissant ordinaire? Discover how this pastry became a breakfast icon worldwide – from Parisian bakeries to Japanese convenience stores – and learn how to bake croissants at home, step by step.
Cold brew - a refreshing coffee beverage - is rapidly gaining popularity worldwide, and it's no wonder. It’s an ideal choice for hot summer days. But does it give us a caffeine kick? This article will reveal how much caffeine is in cold brew and how it compares to other brewing methods.
Caffeine: our engine?
Coffee is a beverage that energizes millions of people worldwide, and its high caffeine content is one of the main reasons some people drink it.
However, there are many misconceptions about the caffeine levels in different types of coffee beverages, and cold brew is no exception. Some say cold brew contains a lot of caffeine, while others claim it has almost none. So, what's the truth?
Starting from the beginning: what is cold brew?
While most of us are familiar with iced coffee, which is hot-brewed coffee served with ice, there is another cold beverage that offers a completely different sensory experience: cold brew.
Cold brew, as the name suggests, is coffee brewed with cold or room temperature water for 8 to 24 hours, after which the grounds are filtered out. The drink is versatile and has a smooth, mild flavor. Cold brew is also perfect for home preparation, requiring no special equipment, and is a flexible brewing method. It allows users to adjust all variables, such as coffee origin, grind size, and brewing time, and experiment until they find the desired outcome. Simple, tasty, and perfect for summer.
Factors influencing caffeine levels in coffee
Caffeine is produced by coffee as a natural pesticide to protect it from insects. The caffeine content in coffee varies depending on many factors, but it is primarily dictated by the coffee species used. Robusta contains nearly twice as much caffeine as Arabica.
Caffeine is resistant to temperature changes, so the roasting process does not break it down. We can safely assume that the roast profile does not significantly affect the caffeine content in our brew, but we must remember that roasting affects the cellular structure of the beans, making it easier to extract soluble substances.
Another key factor is the coffee-to-water ratio: the caffeine content in coffee depends simply on the proportions used and thus on the concentration of the brew.
Caffeine content in cold brew
It is often said that cold brew coffee contains more caffeine than other brewing methods due to its long brewing time, but this is not entirely accurate. While cold brew indeed contains 10% to 30% more dissolved solids than filter coffee, it is usually diluted before serving, which naturally significantly lowers the caffeine concentration. Additionally, when cold brew reaches its “saturation point,” no amount of brewing time can increase the caffeine extraction. This means that after a certain point, longer brewing times do not guarantee more caffeine. For hot brewing methods, 90% of the available caffeine is extracted within the first 6 minutes. In contrast, with cold water extraction, the caffeine content rises sharply within the first 180 minutes, then decreases. Therefore, the caffeine content depends more on how concentrated the drink is and less on the brewing time - although this time has a small impact, making cold brew slightly more caffeinated than the same coffee brewed hot.
