Scoop cookie crumbs and ice cream into the bottom of mason jars.
Add lids and freeze until ready to serve.
Add marshmallow fluff to the top of the ice cream.
Top with mini marshmallows.
Before serving, preheat broiler and broil cups for 1-2 minutes just to slightly toast the marshmallows, but you don’t want the ice cream to melt.
Drizzle with chocolate sauce and eat!