When I was a kid, I loved anything and everything rainbow. I lived for Superman ice cream, rainbow Popsicles in the summer, friendship bracelets and Lisa Frank school supplies. Though I've grown out of my love for Superman ice cream (my brothers have not), a little bit of color goes a long way to brighten up even the grayest of adult days. In continuing with the Shabbat cookie trifecta we started a few weeks ago, Rina and I decided to whip up the the most popular cookie at the post bar-mitzvah kiddish luncheon - the rainbow chocolate drop cookie.