To make the crusts, combine first 4 ingredients and 3 cups chopped peanuts in a bowl. Stir vigorously until a soft dough forms. Divide dough into 9 portions. Press dough firmly with floured fingers into 9 ungreased 10 inch pie plates, bringing dough onto rim of plate.
Flute edges if desired.
Cover edges with foil, if desired, to prevent excessive browning. Bake 8-10 minutes, until light brown. Heat peanut butter and chocolate chips in a saucepan over low heat, stirring constantly, just until chocolate is melted. Remove from heat. Fold in marshmallows.