Grease the bottom and sides of an 9x9 inch baking dish with butter. Combine powdered sugar with cornstarch and sprinkle about half of the mixture evenly over the bottom and sides of the pan.
Make the chai spiced marshmallows. Combine the gelatin with ½ cup cold water in a bowl of a stand mixer. Combine remaining ½ cup cold water with granulated sugar, honey, and a pinch of salt in a heavy-bottomed sauce-pot. Heat the mixture over medium heat until the temperature reaches 240 degrees F, about 7-8 minutes.
Slowly pour the sugar water mixture into the bowl with the gelatin with the mixer on low speed. Continue to beat as you add all of the sugar mix. Increase the speed to high and continue to whip until thick and lukewarm, about 8-10 minutes.
Add vanilla, cinnamon, ginger, cardamom, nutmeg, allspice, and cloves into the marshmallow fluff and whip for another 30 seconds. Transfer mixture to prepared baking dish and sprinkle another ⅓ powdered sugar mixture to dust the top. Let sit for at least 6 hours.
Cut marshmallows into 1-inch chunks. Dip the sticky sides of the marshmallows in the remaining powdered sugar mixture, dusting off the excess. Let sit for 10 minutes.
Spray a 9x13 baking pan with cooking spray. Set aside.
Melt butter in a medium sauce-pot over low heat. Add the marshmallows, vanilla, and a pinch of salt, stirring until the mixture is well combined and the marshmallows are melted.
Measure Rice Krispies in a large bowl. Pour the melted marshmallow mixture into the cereal and mix until the cereal is well coated. Pour the cereal into the prepared baking pan and spread it into one even layer, gently pressing down. Let sit for at least 30 minutes. Slice into bars and serve.