4 c. popcorn
2 c. Rice Chex
2 c. Cheerios
1 stick butter
1/4 tsp. baking soda
1 c. brown sugar
1/4 c. white corn syrup
1/2 tbsp. vanilla

Place popcorn, Rice Chex and Cheerios in large bowl. Place syrup, brown sugar and butter in saucepan and cook 5 minutes, stirring constantly. Remove from heat and add soda and vanilla. Pour over popcorn mixture and coat evenly. Spread the mixture out on 2 cookie sheets and place in 200 degree oven for 20 minutes, stirring every 10 minutes. Cool and break up by hand.