This recipe is credited to Genevieve Zach... with thanks to her daughter in law for sharing it with me.
Heat the oven to 250 degrees F.
In a sauce pan, heat and stir until it boils:
2 sticks butter or margarine
1/2 cup Karo
2 cups light brown sugar
1 teaspoon salt
Once it boils, turn down the heat allowing it to boil gently for 5 minutes - NO stirring.
Remove from heat.
1 teaspoon vanilla
1 teaspoon baking soda
In a very large roaster type pan, pour in:
2 bags of hulless butter popcorn
1 can/jar of nuts of your choice
Pour the warm caramel mixture over it and mix well.
Put in the oven for 1 hour, stirring every 15 minutes.
Cool & enjoy.