How to distinguish the advantages and disadvantages of instant coffee
How to distinguish the advantages and disadvantages of instant coffee
Instant coffee is coffee beans roasted and crushed to get pure coffee, and then extracted and vacuum concentrated into powdered coffee, which can be brewed at any time and dissolve in boiling water. The shelf life of instant coffee is usually two years. Now I would like to introduce the sensory identification of the quality of instant coffee, which can be divided into two stages: before brewing and after brewing.
(1) pre-brewing identification?
High-quality instant coffee-brown to dark brown due to different varieties and processes; irregular particles about 2 mm in size, mixed with some fine powder; unique aroma of coffee due to Maillard reaction during stir-frying. ?
Inferior instant coffee-dark in color, some iron black; caking or agglomeration in tissue due to moisture or other reasons; coffee roasting flavor is weak or can not be smelled at all, replaced by a strong scorched flavor. ?
(2) Identification after brewing?
Good quality instant coffee-completely dissolved, free of dregs and suspended matter; the soup juice is brown and bright; it has a strong coffee aroma; it has a pleasant bitter and sour taste after adding sugar. ?
Inferior instant coffee-after dissolving, there is sediment at the bottom of the cup, and the soup is dark and brown-black (at the same concentration); the aroma is light, but the scorched taste is strong; after adding sugar, the bitter taste and sour taste are strong, especially the aftertaste is hard.
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How can we better ensure the freshness of coffee?
General food has a shelf life, can be eaten during the shelf life, coffee beans also have their own shelf life, but different from ordinary food, the quality of coffee beans is judged by the shelf life rather than the shelf life. As we all know, one of the charm of coffee lies in its aroma, and the aroma of coffee depends on its freshness.
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These 9 types of people should not drink coffee
High blood pressure: Coffee contains caffeine, which can increase blood pressure in some sensitive patients. 2. Renal failure: renal failure patients if there is hyperkalemia phenomenon, the need to cooperate with potassium-limited diet, coffee potassium content is high. 3. Peptic ulcer: caffeine stimulates gastric acid secretion, relaxes smooth muscle vessels of the digestive system, accelerates food metabolism, and reduces the nutritional value of food.
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