2 cups unsalted nuts (optional)
1-1/4 cup granulated sugar
2/3 cups margarine
2/3 dark corn syrup
1 teaspoon vanilla
1/2 teaspoon baking soda
Mix popped popcorn and nuts in a large long pan.
In medium to large saucepan bring sugar, margarine and corn syrup to a boil. Continue boiling for 5 minutes. DO NOT STIR! Add vanilla and baking soda to sugar mixture and stir until foamy. Pour over popcorn and nuts. Toss gently to coat popcorn and nuts.
Bake 1 hour at 250 degrees stirring every 15 minutes.