S'More Cookie Bars
["1 stick butter, softened", "3/4 c. sugar", "1 egg", "1 tsp. vanilla", "1 1/3 c. all-purpose flour", "3/4 c. graham cracker crumbs", "1 tsp. baking powder", "1/4 tsp. salt", "4 Hershey milk chocolate bars (1.55 oz. each)", "1 c. Marshmallow Creme"]
["Heat oven to 350\u00b0.", "Grease 8-inch square baking pan.", "In large mixing bowl, beat butter and sugar until light and fluffy.", "Add egg and vanilla; beat well.", "Stir together flour, crumbs, baking powder and salt.", "Add to the butter mixture and beat until well blended.", "Press 1/2 dough into pan.", "Arrange bars over dough, breaking as needed to fit.", "Spread with Marshmallow Creme. Scatter bits of remaining dough over Marshmallow Creme; carefully press to form a layer.", "Bake 30 to 35 minutes.", "Cool completely and cut."]
["butter", "sugar", "egg", "vanilla", "flour", "graham cracker crumbs", "baking powder", "salt", "milk chocolate", "Marshmallow Creme"]