Happy St. Patrick's Day! I hope you've found a special way to celebrate, whether it's wearing green, downing corned beef, or plotting your nighttime revelry. Me? I'm ringing in March 17 with a Shamrock Shake. We took an office trip to the McDonald's across the street to get our fix of the seasonal St. Paddy's Day-themed drink. I'm not always one for festive-colored food, but the creme de menthe-colored drink was the emerald oasis in my daily grind of a desert. It's chilly, but not cold enough for a brain freeze, and as thick as possible without causing a traffic jam in the straw. First, my palate was hit by a blast of mellow mint, followed by a long, lingering vanilla finish. Sham-shakes have only one caveat: they tend to leave an unpleasant sugary coating in the mouth. (That, and the fact that I wish Uncle O'Grimacey were still around.) If they weren't sold but once a year, I doubt they'd achieve the cult status they have today — although they sure make St. Patrick's Day more delicious. How do you feel about Shamrock Shakes?