Liverpool finally doubled their lead deservedly in the 53rd minute following the change of ends as Fisk struck once more.
The centre-back produced a stunning goal from the edge of the area as she timed her run onto an Endemann cutback perfectly to curl a shot into the corner of the net.
Endemann then turned from provider to goalscorer 10 minutes later as she marked her debut with an emphatic finish inside the box.
The forward pounced on a loose ball in the area to shoot high into the net and hand the Reds an unassailable lead.
In the closing stages, Fisk almost had a hat-trick as she met a corner ball, though her guided header fell inches past the far post.
Substitute Natalia Ramos also twice went close with dangerous shots from outside the area before winning a penalty kick in added time.
Kapocs stepped up late from 12 yards to duly convert and put an exclamation point on victory in the capital.
Liverpool: Keating, Kerr, Fisk, Clark, Bernabe (Agrez, 72), Nagano (Ramos, 72), Maclean, Kapocs, Holland (Höbinger, 67), Endemann (Bergstrom, 67), Olsson (Csillag, 77).
Unused subs: Kirby, Enderby, Woodham, Breen.