Heat the oven to 350. Grease and flour an 8-inch square baking pan. In a medium size bowl, combine the flour, baking powder, and salt. In a large bowl, stir the instant coffee into the water. Gradually add the butter, brown sugar, eggs, and vanilla. Stir until well combined, then stir the flour mixture into the butter mixture just until well combined. Stir in the pecans and raisins. Spread the batter into the prepared pan. Bake the batter 20-25 minutes or until the center springs back when lightly pressed with a fingertip. Cool completely in the pan on a wire rack. Cut into 12 by 2 inch bars. Makes 1 dozen bars.