To obtain a black tea drink containing fruit juice, containing black tea extract and fruit juice in high concentrations, preservable over a long period without causing clouding and precipitation and exhibiting excellent taste, flavor and quality by mixing a tannase-treated black tea extract with a fruit juice.
For example, 200 mL of hot water of 90°C is poured on 20 g of black tea leaf, the tea leaf is decocted at the temperature for 5 min and separated to obtain 200 mL of black tea extract, 50 unit of tannase is added to 100 mL of the extract, the mixture is maintained at 40°C for 30 min and the obtained tannase-treated black tea extract is mixed with a fruit juice such as apple juice. The black tea drink containing fruit juice is preferably prepared by mixing the tannase-treated black tea extract with a fruit juice treated with chlorogenic acid esterase.
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MATSUYAMA AKIRA
WATABE NOBUO
NIPPON DELMONTE CORP