Hands-on 15 min., Total 15 min.
Bring sugar, apple cider, butter, and corn syrup to a boil in a small heavy saucepan over medium-high heat, stirring constantly. Reduce heat to medium, and cook, stirring constantly, 4 minutes. Remove from heat, and stir in vanilla.
Note: If necessary, microwave glaze in a microwave-safe bowl at HIGH 10 to 20 seconds before drizzling over cake.
