Combine flour, sugar, soda, salt, butter, 1/3 cup peanut butter, egg and oats in a large mixing bowl; mix well. Press dough into a greased 13 x 9 x 2-inch pan. Bake at 350° for 20 minutes. Remove from oven and sprinkle with chocolate morsels. Let stand 5 minutes, or until melted; spread evenly. Combine powdered sugar, 1/4 cup peanut butter and milk; beat well. Drizzle over cookies. Cut into 2 1/2 x 3/4-inch bars. Yield: about 32.