In a heavy saucepan or microwave, melt chips and butter. Stir until smooth; cool for 5 minutes. Dissolve coffee granules in hot water; set aside. In a large bowl, beat eggs and brown sugar; beat on medium for 1 minute. Stir in chocolate mixture and coffee. Combine flour and baking powder; gradually add to chocolate mixture.
Transfer to a greased 9-in. square baking pan. Bake at 350° for 30-35 minutes or until a toothpick inserted near the center comes out with moist crumbs. Cool completely on a wire rack.
Dissolve coffee granules in water; set aside. In a small bowl, beat cream cheese until smooth. Beat in confectioners' sugar, melted chocolate and coffee. Spread over brownies.
Melt the chocolate chips and shortening in a heavy saucepan or microwave; stir until smooth. Drizzle over filling. Refrigerate for at least 2 hours before cutting.