My late husband loved this and he fixed it all the time!
1 Cup uncooked popcorn popped
In Bowl Mix:
1 1/2 Cup brown sugar
1 1/2 sticks butter
1/3 Cup Light Karo Syrup
1/2 teaspoon salt
Micro-wave on high 2 1/2 minutes, stir well, Cook 2 1/2 minutes more, add 1/2 teaspoon baking soda, stir well.
Put popped corn in a large brown bag. Pour cooked mixture over.Shake well, close bag, put in micro-wave cook 1 1/2 minutes on high, remove and shake. Cook on high 1 1/2 minutes more, shake again, Cook on high 45 seconds, shake again, cook 30 seconds more. Tear open bag and spread. Be careful, its hot! This is the best carmel corn I ever ate!!!!