Gooey Cereal Snack Mix

I got this recipe from my in-laws the other day.  They were making a large batch for Christmas and to take around to the neighbors.  It is really addicting stuff!

8 c. chex (use a mixture of cinnamon, honey nut, rice, corn...whatever you like, but at least use 2)
4 c. popped popcorn
4 c. kix
2 c. peanuts

2 c. sugar
1 c. whip cream
1 c. karo syrup
1 c. butter

Put first set of ingredients into large bowl.
 
Put second set of ingredients into large saucepan and begin to heat.  Cook until thermometer reads 235 degrees F, stirring constantly. add 1 tsp vanilla when up to temperature. pour over cereal mixture immediately, mix, and let cool on flat pan to cool.