Beat meringue powder and 1/2 cup cold water until stiff, about 4 minutes. In microwave safe bowl combine sugar, corn syrup and 1/2 cup water. Heat on high bringing syrup mixture to a boil (approx. 5 minutes). Remove from microwave and let mixture cool slightly (1-2 minutes). Slowly add syrup to meringue mixture. Beat on HIGH for 4 minutes until stiff and glossy.
For top of range: Mix sugar, corn syrup and water in 2 qt. saucepan. Bring to boil; cool slightly and follow directions above.