How Many Calories Are in a McDonald’s Shamrock Shake?

We checked the nutrition facts on the McDonald's Shamrock Shake. Try not to be shocked.

McDonald’s Shamrock Shake season is here. Photograph by Flickr/Roadsidepictures

‘Tis the season for those minty (and, yes, I’ll admit it, yummy) milkshakes from Mickey D’s. When I was a kid, this was a particularly joyous time of year: Thin Mint season had just ended, and McDonald’s Shamrock Shake season had just begun. Ahhh, sweet, sweet junk-food bliss.

Just so we have all our cards on the table—you know, so you can make an informed decision about whether or not you’ll partake in the annual ritual—I thought it’d be a good idea to take a look at the nutrition profile of a McDonald’s Shamrock Shake. Hold on to your running tights, people — this ain’t pretty.

According to, a small-size order of our dear green friend clocks in at  460 calories and 13 grams of fat. On the plus side, it’s low sodium (150 milligrams) and relatively high protein (10 grams).

Jump up to the medium, and you’re looking at 560 calories and 16 grams of fat, while the large shake has 800 calories and 22 fat grams. For comparison, the average six-ounce filet mignon has about 350 calories and 16 grams of fat. (I’m assuming that’s for a steak that’s not drowned in butter, but still.)

I’m not nudging you to abstain, by the way. But I figure but if you hit the drive through and order one of these bad boys, you should at least know what you’re getting into. And, you know, perhaps adjust the rest of your meals accordingly

By the way, if you ask your Mickey D’s server to hold the whipped cream, you’ll save about 80 calories. Hey, it’s something.

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