Happy Halloween! Here at Slate’s Moneybox, we are always in favor of getting into the holiday spirit with a Halloween costume. But if you aren’t much for festivities, here’s another reason to dress up: It’s your ticket to a $3 burrito at Chipotle.

Once again, Chipotle is bringing back its “boorito” event to celebrate Halloween. The rules are simple. Show up to any Chipotle in a costume from 5 p.m. on and you can purchase a burrito, burrito bowl, salad, or order of tacos for only $3. Chipotle will donate up to $1 million in proceeds from the day to benefit the Chipotle Cultivate Foundation, a nonprofit focused on food health and sustainability.

The Chipotle boorito has come a long way since its humble beginnings. Back in 2008, the boorito was free but you had to dress as a burrito to get it. Many a college student would invest in reams of tin foil to wrap themselves for the complimentary item, then pass off their silver casing for another friend to don and do the same. (An excellent demonstration of this endeavor is available on YouTube.)

The boorito was $2 in 2012 and $3 last year, and it’s surprising that Chipotle is keeping the price steady: Prices on its normal menu have increased on average 4 percent for chicken and 8 percent for beef this year amid rising food costs. In Manhattan, some burritos now go for nearly $9. (So note to New Yorkers: That $3 deal is especially good!)

The only thing that remains unclear is whether Chipotle is throwing in the guacamole with its boorito promotion. We’ve reached out to their team and will update if we hear back on this crucial point. In the meantime, costume up, go forth, and get your booritos.