1Heat oven to 350°F. Spray bottom of 13x9-inch pan with cooking spray.
2In large bowl, dissolve 1 teaspoon instant coffee in 2 tablespoons hot water. Add remaining Bar ingredients; stir until soft dough forms. Spread in pan. Bake 15 minutes; cool completely, about 10 minutes.
3In large bowl, dissolve 2 teaspoons instant coffee in 1/4 cup hot water. Add remaining Frosting ingredients; stir until smooth. Spread over bars. Refrigerate 30 minutes or until set. For bars, cut into 9 rows by 4 rows.