“Witch’s Brew is our twist on a caramel apple that stands out from the crowd with its unique blend of seasonal flavors and textures,” said Mackenzie Gibson, vice president of culinary and menu innovation at SONIC, in a statement. “This hauntingly good creation not only captures the essence of the Halloween season but also delivers a deliciously fun experience that’s truly one-of-a-kind. Witch’s Brew is sure to become a seasonal favorite.”

The Witch’s Brew Slush Float combines the tartness of a green apple-flavored slush with salted caramel bubbles, topped with sweet, creamy soft serve, and finished with even more salted caramel bubbles for an extra burst of flavor, starting at $3.99 for a medium size, the company says.

Additionally, SONIC consumers can enjoy this spooky treat while knowing that their purchase supports public education, it says. SONIC donates a portion of all SONIC Drink, Slush, Blast and Shake sales to support public education through the SONIC Limeades for Learning initiative, the company notes. Powered by the SONIC Foundation, SONIC has donated more than $28 million since 2009 to fund local classrooms, making it one of the largest programs supporting public education in the United States, it says.

Witch's Brew will be available for a limited time only, from Sept. 23 through Nov. 3, at participating locations while supplies last.