Halloween is here, and those who are dressed up for the occasion can stop by their local Krispy Kreme Doughnuts locations for an extra treat.

The chain is offering guests a free doughnut of choice when they wear a costume on Thursday, October 31 at participating locations nationwide. Among the choices visitors will have are the doughnuts in the limited-edition Monster Batch collection.

These creepy-looking doughnuts include:

• Slimon, the Slime Monster Doughnut – An Original Glazed doughnut with lemon slime filling, dipped in spooky green icing with a green Kreme dollop and covered in “slime”
• Mumford, the Mummy Monster Doughnut – An Original Glazed doughnut “wrapped” in purple ​icing
• Hypno-Henry, the Cake Batter Monster – A doughnut filled with cake batter, dipped in yellow icing and orange sanding sugar with a mesmerizing icing swirl

“Slimon and his cycloptic friends are looking to slime and sweeten Halloween parties throughout October,” says Dave Skena, Chief Marketing Officer for Krispy Kreme Doughnut Corporation. “We are asking everyone to keep an eye out for these mischievous monsters … and then eat them. Because they are scary good.”