One of my favorite childhood traditions was pleading with my parents to take me to Mcdonald’s for a Shamrock Shake. The Shamrock Shake, initially developed by Hal Rosen, a McDonald’s franchise owner out of Connecticut, debuted in 1967. He took the vanilla milkshake, a staple item on the menu, added a few drops of minty green syrup, and created a novelty item that found instant success when it launched in 1970 in select locations nationwide. I try to have at least one each season, and seeing that most places begin serving them towards the end of February, there usually is enough time to indulge more than once.