People are always surprised when I tell them these chocolate chip bars come from the microwave. Chockfull of chocolate chips, the bars are especially good served with a big glass of cold milk. —Shirley A. Glaab, Hattiesburg, Mississippi
In a bowl, cream butter and brown sugar. Add egg, milk and vanilla; mix well. Combine flour, baking powder and salt; add to creamed mixture. Stir in 1/2 cup chocolate chips and walnuts. Spread into a greased 8-in. square microwave-safe dish. Sprinkle with remaining chocolate chips. Microwave, uncovered, on high for 3-1/2 minutes or until bars test done, rotating a quarter turn every minute. Cool before cutting.