We tried McDonald's classic Shamrock Shake next to its biggest competition ever — here's the verdict

McDonald's much-loved seasonal Shamrock Shake now has competition in the form of Burger King's new Oreo Irish Mint Shake. 

The Shamrock Shake has amassed a cult following since its inception in 1970; the sight of the minty green shake is a sure harbinger of spring and vaguely Irish themed kitsch. 

But with Burger King's release of the Oreo Irish Mint Shake, McDonald's reign over the green-dyed seasonal milkshake market is being threatened.  

Now the Shamrock Shake is available, and a taste comparison is in order. Is Burger King's launch a vain attempt to disrupt the mint milkshake market, or will the addition of Oreo crumbles dethrone the iconic Shamrock Shake?

SEE ALSO: Starbucks is under fire for selling beverages with more sugar than Coca-Cola

Burger King's latest shot in the fast food wars is the Oreo Irish Mint Shake, a limited release that's pretty clearly aimed at McDonald's classic Shamrock Shake.

BK's shake is on the left; notice the Oreo crumbles dotting the slightly gray shake. McDonald's is much greener — gotta love that food coloring.

First, let's re-familiarize ourselves with the one, the true: the Shamrock Shake. It comes in small, medium, and large; the medium, seen here, cost $3.89. That's absurd NYC pricing, so it's likely less just about anywhere else.