The brewing method and proportions of coffee also have an important impact on its taste. If you brew your coffee for too long or use too much ground coffee, you may over-extract your coffee, making it more sour and astringent. On the contrary, if the brewing time is too short or the amount of coffee powder is insufficient, the coffee may not be fully extracted and the taste will be bland. Therefore, adjusting the brewing method and the amount of coffee powder used can improve the taste of coffee.