One of the times we made this, we discovered the recipe card for the Crispix Mash in the oven with the mash. The baked card is still in the recipe box.
MIX TOGETHER IN LARGE BOWL:
1 box Rice Chex
1 box Crispix
1 box Corn Chex
1 box golden raisins
1 lb. whole pecans
1 bag flaky coconut
1 lb. margarine
2 lbs. brown sugar
1 C. light corn syrup
1 tsp. salt
2 tsp. vanilla
Combine the margarine, brown sugar, syrup and salt in a saucepan and cook until it comes to a rolling boil. Simmer 5 minutes. Add vanilla. Pour over mixture in bowl and stir well. Pour onto shallow pans, layer 2″ high. Bake at 200º for 1 hour, stirring every 15 minutes. Place on waxed paper immediately after taking from the oven to cool.