1/2 cup butter
1/4 cup corn syrup
1 cup brown sugar
1/2 teaspoon salt
1/2 teaspoon baking soda
4 to 6 quarts popped corn

Combine butter, syrup, sugar and salt in an 8 cup glass measuring cup or a 3 quart mixing bowl. Bring to a boil and them cook 2 1/2 minutes. Stir in baking soda. Pour over popped corn in a large grocery bag that has been sprayed with a pan coating. Stir lightly to combine. Put the bag in the microwave and cook 2 1/2 minutes stirring after 1 minute. Remove from microwave and spread out on a cookie sheet to cool. Break apart.