1 c. softened butter
1 1/2 c. quick or old fashioned oats, uncooked
1/2 c. flour
1 c. packed brown sugar
2 eggs
1/2 c. chopped walnuts, optional
1 tsp. vanilla
12 oz. semi-sweet chocolate chips

In large mixing bowl, combine butter, oats, flour, brown sugar, walnuts, eggs and vanilla. Beat 3 minutes at medium speed until light and creamy. Stir in 1 cup chocolate chips. Spread in 8 inch microwave baking dish. Cover dish with waxed paper or plastic wrap. Microwave on high power 4 minutes, rotate dish, microwave 4 minutes longer or until top of cake appears dry and cake has an even color. Sprinkle 1 cup chocolate chips over warm cake. Let stand 10 minutes. Spread evenly over cake. Cool on countertop. Serves 8-12.