Gently twist apart cookies to take the top off. Set top aside.
Snap 4 pretzel sticks in half. Gently press the pretzel sticks (8) into the sides of the cookie.
Take a baggie and fill with room temerature icing. Snip off a corner to leave a tiny hole.
Squeeze out enough icing ontop of the pretzels to hold the cookie top, then press on the cookie.
Dot 2 dots of icing on top of the cookie to make the spider eyes. Optional: Press on mini chocolate chips to define eyes.