Shake Shack is getting a head start on spooky season with a massive sweet treat that might just test the limits of your dessert stomach. The burger chain officially unveiled its new Reese’s Peanut Butter Cup Shake, designed as a full-on collaboration with Halloween’s most iconic candy. Available at participating locations nationwide for a limited time starting September 1, the new item packs an eye-watering 1,900 calories into a single cup, making it a heavy contender for the ultimate spooky season cheat meal.

The high calorie count starts to make a lot more sense once you break down everything loaded into the mix. Shake Shack starts by blending its rich vanilla frozen custard with Reese’s peanut butter sauce, thick fudge, and extra milk chocolate. The drink is then poured into a custom cup lined with a hard, crackable dark chocolate shell that you smash with your straw before taking a sip. To top it all off, the shake gets a generous layer of whipped cream, chopped Reese’s Pieces, and mini Reese’s Peanut Butter Cups.

Fans looking to try the monster creation can pick one up for around $6.49 depending on the location, though it reportedly will not be available at airport or stadium spots. The release comes right as fast-food brands kick off their fall and Halloween menus early across the country. If you plan on tackling this chocolate-peanut-butter heavy hitter, bringing a friend to share might be the wisest play.