Method of Processing Oligosaccharide-Rich Coffee Beans

1 . A method of processing coffee beans, wherein a step for bringing roasted coffee beans into contact with a high-temperature, high-pressure fluid increases an amount of oligosaccharides in the roasted coffee beans.

2 . A method of processing coffee beans, wherein a step for bringing roasted coffee beans into contact with a high-temperature, high-pressure fluid increases an amount of a coffee oil component transferred to a coffee extract, the coffee oil component being contained in the roasted coffee beans.

3 . A method of processing coffee beans, wherein a step for bringing roasted coffee beans into contact with a high-temperature, high-pressure fluid stabilizes a coffee oil component in a coffee extract, the coffee oil component being contained in the roasted coffee beans.

4 . The method of processing coffee beans according to claim 1 , wherein the step is performed at 100 to 230° C.

5 . The method of processing coffee beans according to claim 4 , wherein the step is performed at 160 to 210° C.

6 . The method of processing coffee beans according to claim 1 , wherein the step is performed at a gauge pressure of 0.1 to 3.0 MPa.

7 . The method of processing coffee beans according to claim 1 , wherein the fluid is a saturated steam.

8 . A processed coffee bean product that is processed using the method of processing coffee beans according to claim 1 .

9 . A coffee beverage wherein the processed coffee bean product according to claim 8 is used as a raw material.

10 . A processed coffee bean product having a degree of roasting of L15 to L23 and a soluble oligosaccharide content of 40 to 65 mg per gram, the oligosaccharides having a molecular weight of 500 to 3000.

11 . The method of processing coffee beans according to claim 2 , wherein the step is performed at 100 to 230° C.

12 . The method of processing coffee beans according to claim 2 , wherein the step is performed at a gauge pressure of 0.1 to 3.0 MPa.

13 . The method of processing coffee beans according to claim 2 , wherein the fluid is a saturated steam.

14 . A processed coffee bean product that is processed using the method of processing coffee beans according to claim 2 .

15 . A coffee beverage wherein the processed coffee bean product according to claim 14 is used as a raw material.

16 . The method of processing coffee beans according to claim 3 , wherein the step is performed at 100 to 230° C.

17 . The method of processing coffee beans according to claim 3 , wherein the step is performed at a gauge pressure of 0.1 to 3.0 MPa.

18 . The method of processing coffee beans according to claim 3 , wherein the fluid is a saturated steam.

19 . A processed coffee bean product that is processed using the method of processing coffee beans according to claim 3 .

20 . A coffee beverage wherein the processed coffee bean product according to claim 19 is used as a raw material.