1. Heat oven to 350°F. Grease 13x9x2-inch baking pan.
2. Melt chocolate with 1/2 cup butter. Combine chocolate mixture with sugar, 3 eggs, vanilla and flour in large bowl, beating until well blended. Spread mixture in prepared pan. Bake 12 minutes.
3. Meanwhile, beat cream cheese, remaining 2 tablespoons butter and cornstarch in medium bowl until fluffy. Gradually beat in sweetened condensed milk, then remaining 1 egg, peppermint extract and food color, if desired. Pour mixture over hot brownie layer. Bake 30 minutes or until set.
4. Spread CHOCOLATE GLAZE over top. Cool. Refrigerate until set. Cut into bars. Store covered in refrigerator. Makes about 24 bars.
CHOCOLATE GLAZE: Combine 1 cup HERSHEY'S SPECIAL DARK Chocolate Chips or HERSHEY'S Semi-Sweet Chocolate Chips and 1/2 cup whipping cream in small saucepan. Cook over low heat, stirring constantly, until thickened and smooth. About 2/3 cup glaze.