McDonald's rolls out new Chocolate Shamrock Shake

SAN FRANCISCO - Participating McDonald's restaurants are rolling out five different variations of the Shamrock Shake next week.Their McCafé menu will feature the original Shamrock Shake, a Chocolate Shamrock Shake, a Shamrock Chocolate Chip Frappé, a Shamrock Hot Chocolate and a Shamrock Mocha.The new Chocolate Shamrock Shake is just as it sounds: half a chocolate shake (on the bottom) and half a Shamrock Shake layered on top.If the Chocolate Shamrock Shake sounds familiar,