MOOYAH Burgers, Fries & Shakes, a fast-casual better-burger chain, is launching a limited-time-only promotion to celebrate Halloween. From October 12 until November 1, MOOYAH will offer its creepiest and crispiest creation yet: Frankenfries.

This seasonal menu item will consist of a half order of MOOYAH’s hand-cut french fries and a half order of its sweet potato fries, served with Spooky Sauce and Dracula Dip.

“MOOYAH is excited to offer such a creative item for our guests this season,” says Michael Mabry, chief operating officer of MOOYAH. “Frankenfries are a delicious and fun way to celebrate Halloween, and we hope the MOOYAH family enjoys our new creation.”

In fact, Halloween week—October 26 through November 1—guests who enjoy their favorite MOOYAH burger in costume will be able to add Frankenfries to their order for just $1 with any purchase.

This is the first time MOOYAH is offering this combination to its guests. The Frankenfries will be paired with two new creations: a Spooky Sauce, which is a mash-up of MOOYAH’s BBQ sauce and mayonnaise, and Dracula Dip, a spicy ranch sauce.

MOOYAH Burgers, Fries & Shakes will be celebrating this promotion across its social media channels, getting fans involved on Facebook, Twitter,and Instagram, as well as through its text and email Loyalty Club and at www.MOOYAH.com.

“The words ‘have fun’ are actually in the MOOYAH brand mission, and we’re always looking for ways to do just that,” says Natalie Anderson Liu, director of marketing for MOOYAH Burgers, Fries & Shakes. “Frankenfries combine two delicious products alongside two sauce creations that complement the flavors. We think Frankenfries is fun to say and will be even more fun to eat.”