16 c. popped corn
2 c. light brown sugar
1/2 c. light Karo syrup
1 c. (2 sticks) butter
1/2 tsp. cream of tartar
1 tsp. baking soda

Mix all ingredients except popcorn and baking soda. Dissolve mixture over low heat. Boil for 5 minutes on medium. Remove from heat and add baking soda. Stir and pour over popcorn, coating the corn.

Bake at 250°F for 30 to 35 minutes, stirring every 5 minutes.