HEAT oven to 350 degrees F. Coat 13 x 9-inch baking pan with no-stick cooking spray. Prepare brownie mix according to package directions using oil, water, eggs and cinnamon. Spread batter in prepared pan.
BAKE 28 to 31 minutes or until set in center. Cool completely in pan on wire rack.
DISSOLVE coffee granules in hot water in large bowl. Add powdered sugar, butter, cocoa powder, vanilla and salt; beat until smooth. Spread frosting over cooled bars. Chill at least 1 hour or until frosting is set.
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