I bumped into this on youtube, tried it today, and was pleased with the result. You use your round waffle iron!!
I made my usual healthy choc. chip cookie dough, painted some oil on the iron, then dropped 4 dollops of dough on the iron ( smaller than golf ball size). I closed it for a minute and a half, then removed the cookies to cool.

I eliminated preheating the oven, preparing sheets, and baking for about 15 minutes each sheet. Using the waffle iron, I did the 2 dozen in about 15 minutes. Saved time, power, cleanup of two cookie sheets, and some parchment paper. OK, so they resemble small waffles, but the taste was the same. I think it'll be a good way to whip up cookies in the summer when I dread lighting that oven.

The only drawback was that I had to tend the iron closely, but I was able to do dishes and a few other little kitchen duties in between.