2 14 oz. boxes Crispix
3 c. brown sugar
3/4 to 1 c. light Karo syrup
3 sticks butter
1/2 tsp. baking soda

Boil Karo syrup, brown sugar and butter for 5 minutes, add soda. Pour mixture over Crispix in a large roasting pan. Stir to coat. Bale at 200°F for 30 to 45 minutes, stirring every 15 minutes.