PREHEAT oven to 350°F (or to 325°F if using a glass baking dish). Line 13x9-inch baking pan with foil, with ends of foil extending over sides of pan. Grease foil; set aside.

MICROWAVE unsweetened chocolate and butter in large microwaveable bowl on MEDIUM 2 minutes or until butter is melted; stir until chocolate is completely melted. Stir in sugar. Add eggs and vanilla; mix well. Add flour and instant coffee; stir until well blended. Spread into prepared pan.

BAKE 30 to 35 min. or until toothpick inserted in centre comes out with fudgy crumbs. (Do not overbake.) Cool in pan. Remove brownie from pan using foil handles. Cut brownie into shapes using 1-1/2-inch heart-shaped cookie cutter. Sprinkle tops of brownies wtih cocoa powder.