Put about 3 quarts of popped corn in brown bag, set aside.

1 stick butter
1 c. light brown sugar
1/4 c. white Karo
1/2 tsp. salt

Combine above and put in microwave. Boil on high for 2 minutes. Stir in 1/2 teaspoon baking soda. Pour caramel over popcorn and shake. Put in microwave, cook on high, 1 minute. Shake, cook on high for 1 minute. Shake, spread out on wax paper.