1 pound butter, melted
4 cups brown sugar
1 cup corn syrup
2 tablespoons salt
1 tablespoon baking soda
1 tablespoon vanilla
12 quarts popped corn
Stir butter, brown sugar, corn syrup and salt constantly over high heat.
Bring to a boil, then refrain from stirring. Let the mixture boil for 5 minutes.
Add the baking soda and vanilla.
Pour over the corn and bake at 250 degrees for one hour, stirring every 15 minutes.