I claim the ornamental design for an ice cream scoop, as shown.
FIG. 1 is a top plan view of the ice cream scoop showing my new design.
FIG. 2 is a bottom plan view thereof.
FIG. 3 is a left side view thereof, the right side being a mirror image.
FIG. 4 is a front view thereof; and,
FIG. 5 is a rear view thereof.
The inside portion of the handle of the ice cream scoop, shown in the cross-sectional view of FIG. 1, is hidden from view in the as-manufactured article and does not form part of the claimed design.