Caramel Apples II

12 apples
12 craft sticks
2 cups sugar
1 cup brown sugar, packed
2/3 cup white corn syrup
2/3 cup butter, cubed
1 cup heavy cream
1 teaspoon salt
1 teaspoon vanilla extract
Chopped nuts, if desired

Insert craft sticks into stems of apples. Mix all ingredients, except the vanilla and nuts, in a large saucepan: cook stirring constantly, to 240 degrees on a candy thermometer. Remove from heat and let cook until mixture thickens. Add vanilla. Quickly dip apples in the mixture and twist until apples are evenly coated. Place on waxed paper to drain and firm up. If desired, roll apples in chopped nuts.