Prepare the pan by lining it with parchment paper, leaving overhang on the sides so you can lift the bars when they are done. Spray the pan (yes even after lining) with non stick spray
In a very large pot, add in butter and turn heat to low, when the butter is melted, add in the 8 cups of mini marshmallows
Stirring frequently, turn the heat up to medium. Let the marshmallows and the butter heat until completely melted. If any marshmallows are still keeping their shape, do not move on to the next step! Melt until thick marshmallowy syrup forms
Add in the salt and chai spice, mix until smooth
Add in the rice krispie cereal and mix until marshmallow and cereal are evenly combined. Remove pan from heat
While the mixture is warm, add in the remaining two cups of mini marshmallows and mix
Lightly Press this mixture into the prepared pan using a nonstick spatula sprayed with nonstick spray or your hands. Set aside while you make the glaze