Angel Shortbread Cookies (from Southern Living)

Yields: 6 angel cookies and about 1 dozen star cookies

1 cup butter, softened
2/3 cup sugar
1 egg yolk
2 teaspoons vanilla extract
2 cups all purpose flour
1/8 teaspoon salt
1 large egg
2 tablespoons whipping cream
1 (3.3 ounce) jars white sparkling sugar*
1 to 2 tablespoons light corn syrup (optional)
4 (2 ounce) squares vanilla candy coating

Beat butter at medium speed [...]