2 cups light brown sugar
1/2 cup white syrup
1 stick butter
1/4 tsp. cream of tartar
1/2 tsp. baking soda
5 quarts popped popcorn

Mix first 4 ingredients and boil for 5 minutes. Remove from heat. Add soda. Pour over 5 quarts salted popcorn. Mix well.

Bake in 200°F oven for 1 hour, stirring every 15 minutes. Cool.