“Ooey gooey BonBites wrapped inside S’mores cookies and sandwiched with our signature frosting,” says Cinnabon’s website about the S’mores Cookie BonBite Sandwich.

Just don’t dawdle. The cookie sandwich is a limited-time-only item, so you snooze, you lose.

The calories and sugar in a S’mores Cookie BonBite Sandwich

Where else can you get a 580-calorie cookie that packs 12 teaspoons of added sugar (an entire day’s worth) plus 12 grams of saturated fat (60 percent of a day’s quota)?

Sure, you could eat a stack of 11 Oreos to match the calories and sugar, but the Oreos have “only” 7 grams of sat fat. Calorie-wise, the S’mores Cookie BonBite Sandwich is a Big Mac—not exactly a quick pick-me-up at a shopping mall or airport.

How unhealthy is a regular Cinnabon cinnamon roll? 

The S’mores Cookie BonBite Sandwich is only a “bite” next to Cinnabon items like the original 880-calorie Classic Roll, the 1,080-calorie Oreo Topped Classic Roll, or the 1,090-calorie Caramel PecanBon. Each packs roughly half a day’s calories, a full day’s worth of saturated fat, and 1 to 1½ days’ worth of added sugar.

Exactly how much sugar is that? The Cinnabon Classic Roll, for example, has 59 grams of added sugar. That’s 14 teaspoons—about two teaspoons more than the daily max of added sugar for adults (50 grams).

But the Caramel PecanBon’s 1,090 calories come with a whopping 75 grams of added sugar. That’s equal to 150 percent of the daily max (roughly 18 teaspoons). Sheesh.

What ingredients are in a Cinnabon cookie sandwich or cinnamon roll?

Judging by Cinnabon’s frozen supermarket items, we’re guessing that its buns, rolls, and bites are all variations on a white-flour-sugar-palm-oil-margarine theme. (The restaurants don’t divulge ingredient lists. We asked the company.)

Our advice: Inhale as much of that tempting cinnamon aroma as you’d like...then keep walking.