Chocolate Chip Bars
["1/2 c. butter or margarine, softened", "3/4 c. brown sugar, packed", "1 egg", "1 Tbsp. milk", "1 tsp. vanilla", "1 1/4 c. flour", "1/2 tsp. baking powder", "1/8 tsp. salt", "1 c. chocolate chips, divided", "1/2 c. chopped walnuts (optional)"]
["Cream butter and sugar until fluffy.", "Add eggs, milk and vanilla.", "Mix well.", "Blend in dry ingredients.", "Stir in 1/2 cup chocolate chips and the walnuts.", "Spread in an 8-inch square Pyrex dish that has been greased.", "Sprinkle remaining chocolate chips on top.", "Microwave on High for 5 to 7 minutes, turning dish every 2 minutes, until done.", "Cool and cut into bars.", "Do not overbake."]
["butter", "brown sugar", "egg", "milk", "vanilla", "flour", "baking powder", "salt", "chocolate chips", "walnuts"]