Here's what you'll need:
3-4 quarts popped corn
Place stick of butter, brown sugar, salt and corn syrup into microwave safe glass bowl. Place in microwave and heat on high until it comes to a boil. Times will vary by microwave so you will want to watch it closely. Once it comes to a complete boil remove from microwave and stir.
Return to microwave and cook for 1 minute.
Remove, add baking soda and stir well. Mixture will thicken and lighten in color. Pour mixture over the popcorn inside the paper bag.
Fold the top of the paper bag down several times to close~ then shake, shake, shake! (Go ahead, play some Zumba music here!)
Shake really well to distribute the caramel and coat all of the popcorn.
Place entire bag of popcorn back into the microwave and heat on high for another 1 1/2 minutes. Remove and shake some more. (Cue Zumba music again).
Let cool and enjoy!