The ornamental design for a benchcookiecone, as shown and described.
FIG. 1 is a top perspective view of a bench cookie cone showing our new design.
FIG. 2 is a top view thereof.
FIG. 3 is a bottom view thereof.
FIG. 4 is a front view thereof; and,
FIG. 5 is side view thereof.
The broken line showing of the bottom portion of FIG. 3 is included for the purpose of illustrating portions of the bench cookie cone and forms no part of the claimed design.