3 qts. popped popcorn (dry)
1 c. brown sugar
1 stick butter
1/4 c. Karo syrup
1 tsp. vanilla
1/2 tsp. baking soda

Cook sugar, Karo, butter in glass bowl in microwave on high 3 minutes. Stir and cook 1 minute on high. Add vanilla and baking soda and stir. Pour over popcorn in paper bag. Shake well. Microwave on high for 1 1/2 minutes. Shake well. Microwave on high for 30 seconds. Spread on aluminum foil and let dry. All done.