Welsh, Joe Christopher,Jackson, Tamsin Mikeala,Mulvany, Jonathan Patrick,Rees, Jack,Kang, Won
申请号：
AU2017256754
公开号：
AU2017256754A1
申请日:
2017.04.27
申请国别(地区):
AU
年份:
2018
代理人:
摘要：
The present invention provides a method for the manufacture of a freeze-dried coffee powder, the method comprising: providing a coffee extract having from 40wt% to 55wt% solids； adding gas to the coffee extract in an amount of from 1NL/kg to 5NL/kg of coffee extract, to provide a gas-containing coffee extract at above atmospheric pressure； depressurising the gas-containing coffee extract to form a foamed coffee extract； cooling the foamed coffee extract to below -40°C without shear, or with low shear, to form a frozen coffee extract, grinding the frozen coffee extract to a powder； and drying the powder, wherein the step of cooling the foamed coffee extract to below -40°C comprises: (i) cooling the foamed coffee extract to a first temperature； (ii) cooling the foamed coffee extract from the first temperature to a second temperature lower than the first temperature； and (iii) cooling the foamed coffee extract from the second temperature to below -40°C, wherein the first temperature is 1°C above a freezing point of the foamed coffee extract and wherein the second temperature is 3°C below the freezing point, wherein step (ii) has a duration of from 5 to 90 minutes, preferably 10 to 60 minutes.
