Microwave Chocolate Chip Bars
["1/2 c. butter, softened", "3/4 c. brown sugar, packed", "1 egg", "1 Tbsp. milk", "1 tsp. vanilla", "1 1/4 c. all-purpose flour", "1/2 tsp. baking powder", "1/8 tsp. salt", "1 c. (6 oz.) chocolate pieces, divided", "1/2 c. chopped nuts (optional)"]
["In small mixing bowl, cream together butter and sugar until fluffy.", "Add egg, milk and vanilla; mix well.", "Stir together flour, baking powder and salt.", "Add to creamed mixture.", "Blend well.", "Stir in 1/2 cup chocolate pieces and nuts.", "Spread in paper towel-lined 8-inch square dish.", "Sprinkle with remaining 1/2 cup chocolate pieces.", "Microwave at High 5 to 7 minutes, rotating dish 1/4 turn every 2 minutes until done.", "Cool and cut into bars. Makes 24 bars."]
["butter", "brown sugar", "egg", "milk", "vanilla", "flour", "baking powder", "salt", "chocolate", "nuts"]