Add the pie crust to a deep pie dish and squish it down with your hands or the bottom a of a measuring cup so that it covers as much of the pan as possible. If you bought a preassembled graham cracker crust, more power to you.
In a medium pot, mix the sugar, flour, cocoa, chai confection, salt and eggs and mix until combined.
Slowly stir in the milk, and heat on medium high heat, stirring constantly until it reaches a boil. This'll take about 10-15 minutes. Once it's reached a boil, remove it from the heat and add the butter and vanilla.
Pour the pudding into your pie shell (no need to pre-bake), and cover the surface with marshmallows. You can use as many or as few as you'd like.
Broil on high heat for about 4-5 minutes, or until the marshmallows are nice and toasty. Then transfer to the fridge for about 4 hours, or overnight.