Microwave Caramel Popcorn

 4 Quarts popcorn - popped

1 cube Butter

1 Cup brown sugar

1/4 Cup Karo Syrup

1 TBS vnailla

few shakes salt

Put popped popcorn in brown paper bag that has been sprayed with Pam.  Bring the rest of the ingredients to a boil.  Take off heat and add 1/2 tsp soda.  mix well.  Pour over top of the popcorn.  Roll up the bag and microwave one minute on high.  Shake bag.  Microwave one minute on high - Shake Bag.  Microwave 30 seconds on high - Shake bag.  Microwave 20 seconds on high and Shake bag
.  Pour out onto cookie sheet and let cool.