• In a large bowl, cream butter and brown sugar until light and fluffy.

   

   
• Beat in egg and coffee.
• Combine the flour, baking powder, cinnamon, baking soda and salt; gradually add to creamed mixture.

   
• Stir in chocolate chips and optional walnuts.
• Spread into a well-greased 8-in. square baking dish.
• Bake at 350° for 30-35 minutes or until a toothpick inserted near the center comes out clean.

GLAZE

• In a small bowl, combine the confectioners' sugar, vanilla and enough milk to achieve a desired consistency.
• Drizzle over warm bars.
• Cool completely on a wire rack before cutting.