I am an infrequent baker but decided that I'd like to make some cookies this holiday season. The consensus on the Board seemed to be that the Martha Stewart recipe was best for sugar cookies. The recipe calls for lining the cookie sheets with parchment paper. How essential is this? When I went to the grocery store today, all parchment paper was sold out. When I made sugar cookies as a kid, I recall that we placed the cookies directly on the cookie sheet (ungreased, I think). Comments?