Cocoa Pebbles S'Mores Bars
["about 8 whole graham crackers", "1 pkg. (8 sq.) Baker's semi-sweet baking chocolate", "6 Tbsp. butter or margarine, divided", "1 (10 oz.) pkg. miniature marshmallows", "1 (13 oz.) pkg. Post Cocoa Pebbles cereal"]
["Line a 13 x 9-inch pan with foil. Grease bottom and sides of foil-lined pan. Place graham crackers on bottom of pan, cutting crackers to fit."]
["graham crackers", "chocolate", "butter", "marshmallows", "Cocoa"]