1In 2-quart saucepan, heat whipping cream and baking bar pieces over low heat, stirring constantly, until melted and smooth. Stir in vanilla and peppermint extract. Cool slightly. Cover and refrigerate at least 2 hours until chilled.
2Heat oven to 400ºF. Cut pastry sheet crosswise into 4 strips, then lengthwise into 3 strips to make 12 rectangles. Place on ungreased cookie sheet. Bake 12 to 15 minutes or until golden brown. Split horizontally in half while warm.
3In small bowl, beat white chocolate mixture with electric mixer on high speed until stiff (do not overbeat). Place bottom halves of pastry pieces, split sides up, on serving plates. Fill each with about 1/3 cup white chocolate mixture; add tops of pastry pieces. Drizzle with chocolate syrup. Sprinkle with candies.