Yes, I know - looking at them now, it's clear that "Black and White Elegance" was the way to go, but I had a few stressful days there, all right?!
Here's a refresher on how to create a quilted effect on a cookie.
( I say refresher, because that was one of the earliest cookie tutorials I wrote on this blog, even before I had access to small, neat 00 icing tips. I cringe when I look at my amateur photography and early cookies; but if you insist on seeing it ... you'll find that post here!)
Quilted Cookie Tutorial:
Using an edible marker, or non-toxic graphite pencil, outline a grid of squares on the cookie. Pipe lines over the grid using an Ateco 00 or PME 1.5 tip and soft-peak consistency royal icing
Flood alternate square with flooding-consistency royal icing and allow to set (+/- 20min - depending on the ambient humidity). Once those squares have set, fill in the remaining squares.
Allow those squares to dry, then pipe dots of icing (soft-peak consistency) where the edges of the squares meet. Allow the cookie to dry completely overnight before packaging.