Is coffee a kind of soybean milk?
Not really. Coffee is not soybean milk. The beans of soybean milk belong to leguminous plants, and you can see the beans when you open the mature pods. The coffee beans that make coffee belong to Rubiaceae, not beans in the botanical sense. Coffee fruit is a kind of fruit that looks like berries. After removing the pulp, coffee beans are obtained, and then caramelization is caused by baking.