Rocky Road Bars
["1/4 c. sifted all-purpose flour", "1/4 tsp. baking powder", "1/8 tsp. salt", "1/3 c. brown sugar, packed", "1 egg", "1 Tbsp. butter, softened", "1/2 tsp. vanilla", "1 c. walnuts, coarsely chopped, divided", "1 c. marshmallows, quartered", "1 (6 oz.) pkg. chocolate chips"]
["Preheat oven to 350\u00b0.", "Sift flour with baking powder and salt. Add sugar, egg, butter and vanilla. Beat until smooth.", "Stir in 1/2 cup walnuts.", "Turn into greased 9-inch square pan. Bake for 15 minutes until top is lightly browned and springs back when touched lightly. Remove from oven."]
["flour", "baking powder", "salt", "brown sugar", "egg", "butter", "vanilla", "walnuts", "marshmallows", "chocolate chips"]