1-1/2 cups popcorn, not popped for 2 batches
OR 2/3 cup for 1 batch
1 cup margarine or butter
2 cups brown sugar
1/2 cup corn syrup
1 tsp salt
1 tsp vanilla
1 tsp baking soda
Preheat oven to 250 F degrees. Pop the popcorn and set aside (a large roast pan works well, allowing for room to stir).
Bring margarine or butter, brown sugar, corn syrup and salt to a boil, stirring constantly. Reduce heat and cook for 5 minutes. During this period, do not stir AT ALL.
Remove from heat and add the vanilla and baking soda. Mix and pour over popcorn. Put into the oven at 250 F, checking and stirring every 15 minutes for 1 hour.
** Add chopped peanuts, if you want.