LIQUID COFFEE BEVERAGE WITH IMPROVED AROMA
The present invention relates to a liquid coffee beverage in a closed container with improved aroma having a high ration of high volatile coffee aroma compounds to low volatile coffee aroma compounds in the gaseous headspace, and a method of producing
1 . A liquid coffee beverage in a closed container with a gaseous headspace, the gaseous headspace comprising a ratio of high volatile coffee aroma compounds to low volatile coffee aroma compounds of at least about 1.5 when measured at 25° C.; wherein high volatile coffee aroma compounds are compounds selected from the group consisting of methanethiol, dimethylsulfide, dimethyldisulfide, methylpropanal, 2-methylbutanal, 3-methylbutanal, 2-methyl-furan, N-methyl-pyrrole and combinations thereof; and wherein low volatile coffee aroma compounds are compounds selected from the group consisting of 2-ethyl-5-methylpyrazine, 2-ethyl-6-methylpyrazine, trimethylpyrazine, 2-ethyl-3,5-dimethylpyrazine, 2-ethyl-3,6-dimethylpyrazine, 2,3 -diethyl-5-methylpyrazine, pyridine, furfural, furfurylalcohol, 5-methylfurfural, guaiacol, ethylguaiacol, vinylguaiacol, acetic acid and combinations thereof.
2 . A liquid coffee beverage according to claim 1 , wherein the gaseous headspace comprising a ratio of high volatile coffee aroma compounds to low volatile coffee aroma compounds of at least about 2 when measured at about 25° C.
3 . A liquid coffee beverage according to any of claim 1 , wherein the gaseous headspace comprising a ratio of high volatile coffee aroma compounds to low volatile coffee aroma compounds of at least about 3 when measured at 25° C.
4 . A liquid coffee beverage according to claim 1 , wherein the liquid beverage comprises between about 0.1% and about 60% of coffee solids.
5 . A liquid coffee beverage according to claim 1 , wherein the liquid beverage comprises between about 0.1% and about 5% of coffee solids.
6 . A liquid coffee beverage according to claim 1 , wherein the liquid beverage comprises between about 10% and about 60% of coffee solids.
7 . A liquid coffee beverage according to claim 1 comprising between about 0.5% and about 20% of milk solids.
8 . A liquid coffee beverage according to claim 1 comprising between about 1% and about 20% of sugars.
9 . A liquid coffee beverage according to claim 1 comprising between about 0.5% and about 8% of fat or oil.
10 . A liquid coffee beverage according to claim 1 comprising at least one buffer salt selected from the group consisting of sodium or potassium bicarbonate, sodium or potassium carbonate, sodium or potassium citrate, and disodium or dipotassium hydrogen phosphate.
11 . A method of producing a liquid coffee beverage in a closed container, the method comprising the following steps:
a) stripping coffee aroma from roast and ground coffee with steam to produce steam comprising coffee aroma;
b) removing low volatile coffee aroma compounds from the steam comprising coffee aroma;
c) recovering high volatile aroma compounds from the steam comprising coffee aroma;
d) adding recovered high volatile aroma compounds of step c) to a liquid coffee extract; and
e) filling the liquid coffee extract with added high volatile aroma compounds into closed containers to produce a liquid coffee beverage.
12 . The method of claim 11 wherein the liquid coffee extract with added high volatile aroma compounds obtained in step d) is not subjected to drying.