1. Melt butter in a 1-qt. saucepan over medium heat. Whisk in brown sugar and corn syrup; cook 1 minute. Add powdered sugar, milk, and vanilla; whisk until creamy (about 2 minutes). Remove from heat, and use immediately.
Note: Pour all of Brown Sugar-Praline Glaze immediately over cooled cake in a circular motion. Cut cake with a serrated knife.