Almond Toffee Popcorn

1 cup granulated sugar
1/2 cup butter
1/2 cup white corn syrup
1/4 cup water
1 cup toasted almonds, chopped
1/2 teaspoon vanilla extract
1/2 cup popcorn, popped

In heavy saucepan, combine sugar, butter, corn syrup, water and almonds. Cook over moderate heat to 280 degrees F on a candy thermometer. Add the vanilla extract. Stir well and pour over the popped corn.