What is in coffee?

Coffee contains very similar chemicals whether made from beans or instant powder/granules. Various chemicals are dissolved and leached from roasted beans, precsiely what they are depending on the level of roast and the source of the bean. A major constituent is caffeine, but the characteristic taste and smell come from various oils, acids and caramelised compounds that are also present in a cup of coffeee. Sometimes people add milk and/or sugar to add taste to the coffee, how much sugar and milk they add depends on the person, A Black coffee is a coffee with no milk in it, this makes it a darker colour, than if it had milk in it.