Spray a 9- x 9-inch baking pan with cooking spray.
Melt chocolate chips over a double broiler or in the microwave. If you’re cooking in the microwave, cook on HIGH 10 seconds and stir; continue cooking at 10-second intervals until all of the white chocolate is melted. Stir in strawberry frosting until combined. Spread mixture evenly into prepared baking pan. Cover and chill in the refrigerator 30 minutes or until set. Using a heart cookie cutter cut out strawberry fudge shapes and place on a serving plate. Decorate, if desired, and serve. Store in the refrigerator for up to 4 days.