The Shamrock Shake, introduced in 1970, is made with vanilla soft-serve ice cream, artificially flavored minty green syrup and whipped topping (prices are set by individual restaurants; about $3-$4, depending on size).

According to the home of the Hamburglar, the Shamrock Shake was created in 1967 by Hal Rosen, a franchise owner in Connecticut who made the mint shake in celebration of St. Patrick's Day.

Original Shamrock Shake: Basically a vanilla shake with mint syrup topped with whipped cream and a cherry. Nice enough (though I always wished there were chocolate chips in it).

The Shamrock Hot Chocolate and Shamrock Mocha are the regular McCafe menu beverages with Shamrock Shake syrup blended in for an extra dose of deliciousness. Plus, all five drinks - the original Shamrock Shake included - are receiving a sprinkle of green sugar crystals on top as the new finishing touch (because why not?).

The Shamrock Shake is a seasonal green mint flavored milkshake dessert sold at some McDonald's restaurants during March to celebrate St. Patrick's Day in the US, Canada and Ireland.

1. The Shamrock Shake was created in 1967 by Hal Rosen, a Connecticut McDonald's Owner/Operator who made the delicious, mint shake in celebration of St. Patrick's Day. It later debuted in select locations across the U.S. in 1970 and was an instant success.

The First Shamrock Shake The celebrated drink got its start as the “St. Patrick's Day Green Milkshake,” created in 1967 by Connecticut McDonald's owner and operator, Hal Rosen. It wasn't until three years later in 1970 that corporate made the decision to debut the “Shamrock Shake” in select locations across the US.

The Shamrock Shake didn't taste any different than it had in the past. It's a vanilla shake with mint syrup mixed in, making it taste like a minty vanilla shake. This is what happens when you use vanilla as a base - we learned this the hard way with Wendy's strawberry and peppermint Frosty releases.

Our chocolate shake recipe features delicious soft serve and chocolate syrup, finished with whipped light cream . There are 520 calories in a small Chocolate Shake from McDonald's.

The tastes that come from the shake are a mixture of mint and vanilla. The minty freshness helps to smooth out the creamy richness of the vanilla.

The word shamrock derives from the Irish seamróg, which is a diminutive of seamair óg meaning "young clover". Ireland's association with the shamrock grew from the 18th century onwards, in a similar way to other associations like a rose for England, a thistle for Scotland and a daffodil for Wales.

While trying to convert the Irish into Christians, St. Patrick used the shamrock to explain the holy trinity with each leaf representing the Father, Son and Holy Spirit. The three leaves of a shamrock are also said to stand for faith, hope and love. A fourth leaf is where we get the luck from.

The shamrock is a type of clover, although botanists and the public are divided on which species of clover exactly is a shamrock. None of these species are unique to Ireland - they all grow across Europe. The word shamrock derives from the Irish seamróg, which is a diminutive of seamair óg meaning "young clover".