1 1/2 c. graham cracker crumbs
1 can sweetened condensed milk
2/3 c. chopped nuts
1 (6 oz.) pkg. semi-sweet chocolate chips

Mix ingredients together and pour into 10 x 15 inch pan that is greased and lined with waxed paper. Bake for approximately 30 minutes. Turn pan upside down and remove waxed paper before cooling. Cut in squares.