In a medium mixing bowl, stir together the cracker crumbs and melted butter until evenly coated. Press mixture into a pan. Bake for 8-10 minutes.
In a medium saucepan, whisk together cream and milk. Warm over medium-low heat. 4. Add in chocolate and stir until chocolate has completely melted and is smooth. Slowly add in vanilla and whisked eggs, and whisk until smooth.
Pour chocolate filling into baked crust. Bake for 15-20 minutes, or until chocolate filling is set and does not jiggle when the pie is lightly shaken. Remove from the oven.
Using kitchen shears or a knife, cut marshmallows in half. Place halves in concentric circles over the top of the pie until covered.