Preheat oven to 375 F.

In a mixing bowl, cream butter and sugars together. Beat in egg, milk and vanilla.

Combine the flour, graham cracker crumbs, baking soda, salt and cinnamon; gradually add to the creamed mixture. Stir in chocolate chips.

Drop by tablespoonfuls onto ungreased cookie sheets. Bake for 8-10 minutes or until golden brown. Cool on wire racks.

Place four cookies bottom side up on a microwave safe plate. Top each cookie with a large marshmallow. Microwave, uncovered, on high for 15-20 seconds or until marshmallows begin to puff. Top each with a cookie. Repeat.