DIY Ice Cream that blew my mind (lactose intolerant but couldn't stop eating)

Make some delicious chocolate ice cream in a bag and add all your FAVORITE things with this at home (or in the lab) edible science experiment! Add all your favorites...marshmallows, Oreos, extra chocolate (or just basic vanilla). For the Science behind the experiment check out part 2! (coming soon...)
Supplies:
ice
salt
two plastic bags
half and half
sugar
(options)
chocolate powder or syrup
oreos
marshmallows
nuts