Instant green tea and preparation method thereof

Abstract

The invention specifically discloses instant green tea and a preparation method thereof. The instant green tea is prepared from fresh tea leaves, and the preparation method comprises processing steps of breaking, extracting, filtering, concentrating, forming and drying, wherein the step of concentrating is realized by concentrating through a reverse osmosis membrane and implementing low-temperature vacuum concentration to obtain a concentrated solution which has 30-50% of solid content; in the step of forming, a blow molding process is adopted, and carbon dioxide gas is filled under high pressure to be coated in the tea concentrated solution; the step of drying adopts supercritical carbon dioxide drying; before breaking, the preparation method further comprises steps of high-temperature and high-pressure steam treatment and quick freezing, so that enzymes in the tea leaves are deactivated and GCG is generated, and therefore, oxidation resistance of the tea leaves is enhanced. Through the method disclosed by the invention, active ingredients in the tea leaves are completely extracted and preserved, and the active ingredients are prevented from being oxidized in the preparation process; meanwhile, the granulated green tea or sliced green tea is filled with carbon dioxide, so that taste and aroma in drinking of the instant green tea are improved.

Description

technical field [0001] The invention relates to the technical field of tea beverage processing, in particular to an instant green tea and a preparation method thereof. Background technique [0002] In recent years, there have been more and more studies and reports on green tea, and the research on instant tea has also been the subject of many researchers, and it is deeply loved by consumers. Instant tea powder is a general term for a class of tea products that are solid, soluble in water, and retain the flavor of the original tea after extraction, filtration, concentration, and drying of tea leaves as raw materials. Instant green tea is one of them. However, the existing problems of traditional granule green tea are as follows: (1) The leaching rate of tea leaves needs to be improved: granule green tea is mainly used as the raw material of teabags, and enters the domestic and foreign markets with teabags as the terminal product, and the high leaching The efficiency helps t...

AI Technical Summary

Problems solved by technology

However, the existing problems of traditional granule green tea are as follows: (1) The leaching rate of tea leaves needs to be improved: granule green tea is mainly used as the raw material of teabags, and enters the domestic and foreign markets with teabags as the terminal product, and the high leaching The efficiency helps to improve the market competitiveness of teabags, and can also be used as an excellent raw material for extracting natural tea products; (2) The product quality is low and urgently needs to be improved: for a long time, domestic tea companies have mostly used secondary teas (broken, flakes, powder) as teabag raw materials, its poor color, aroma, and taste quality give consumers the impression that teabags are low-quality and low-grade, and there is an extreme shortage of new products with good quality, which has seriously restricted green tea. The development of exports and domestic consumption