Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  15      cups          Unsalted popcorn
   1      cup           Packed brown sugar
     1/2  cup           Margarine or butter
     1/4  cup           Light corn syrup
     1/2  teaspoon      Salt
     1/2  teaspoon      Baking soda

Preparation:

Heat oven to 200 degrees. Divide popcorn between 2 ungreased rectangular pans, 13 X 9 X 2 inches. Cook brown sugar, margarine, corn syrup and salt over medium heat, stirring occasionally, until bubbly around edges. Continue cooking 5 minutes; remove from heat. Stir in baking soda until foamy. Pour over popcorn. Toss until well coated. Bake 1 hour, stirring every 15 minutes.