Step 1

In a bowl, combine ⅓ cup shortening, ¼ cup hot milk, confectioners' sugar, and vanilla and beat until smooth, about 2 min. Set aside.

Step 2

In a saucepan, boil together 1 tbsp shortening, ½ cup cold milk, corn syrup and brown sugar until temperature reaches 235°F (soft-ball stage) on a candy thermometer, about 10 min. Pour over shortening mixture and beat until smooth and creamy, about 2 min. If icing isn't smooth enough, add 1 tbsp hot water.