Oven to 375 degrees. Stir together graham cracker crumbs, flour and powder in small bowl; set aside. Beat sweetened condensed milk and butter until smooth; add reserved crumb mixture, mixing well. Stir in chocolate, m&ms, coconut and walnuts. Drop by rounded tablespoons onto ungreased cookie sheet. Bake 8-10 minutes or until lightly browned. Cool 1 minute, remove from cookie sheet to wire rack. Cool completely.
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