Fluffy Caramel Frosting

1-1/2 cups/375 mL brown sugar
1/2 cup/125 mL water
1/8 tsp/0.6 mL Watkins Cream of Tartar
3 egg whites, room temperature
1-1/2 tsp/7.5 mL Watkins Caramel Extract

Combine brown sugar, water and cream of tartar in heavy medium-sized saucepan. Cook over medium heat, stirring constantly, until sugar is dissolved and mixture begins to boil. Continue to boil until it reaches a temperature of 240ºF/115ºC on candy thermometer. Just prior to reaching appropriate temperature, beat egg whites in large mixing bowl until soft peaks form. Pour brown sugar syrup in a steady stream into egg whites while beating. Continue beating until stiff peaks form. Beat in Caramel Extract.