Indoor S'mores

15 oz of marshmallows (1 1/2 of the small bags, part of a large bag)
6 Tbsp butter
1 tsp vanilla
1 small box of golden grahams (12 oz)
1 cup milk chocolate chips

Melt butter in pot over medium heat. Add in marshmallows and stir until melted. Remove from heat, add vanilla and stir. Stir in golden grahams. Stir in chocolate chips until fairly well mixed. Pour into greased 9x13 pan. Serve warm or let cool and set up.