The ornamental design for a waffleironplate, as shown and described.
FIG. 1 is a front perspective view of a waffle iron plate, showing my new design.
FIG. 2 is a front view thereof.
FIG. 3 is an enlarged partial view thereof, showing a single recessed grid feature for clarity of illustration.
The upper, lower, left and right sides and the rear surface of the waffle iron plate are flat with constant thickness and devoid of surface ornamentation.
The light, evenly spaced and diagonally arranged lines shown within the recessed grid features represent surface shade and not surface ornamentation.