1 1/2 cups graham cracker crumbs, finely crushed
3 tbls. sugar
6 tbls. butter or margarine
1 package brownie mix
3 cups miniature marshmallows
1 cup semi sweet chocolate chips
Thoroughly mix grahams cracker crumbs, sugar and butter together in a medium bowl. Press firmly into the bottom of a greased 9x13 pan; chill.
Prepare brownie mix according to package directions. Pour onto chilled graham cracker crust. Bake according to package directions.
Remove pan from oven and top evenly with marshmallows and chocolate chips. Return the pan to oven for 3 minutes. Cool before cutting into squares.