Chex Party Mix

8 cups Chex mix cereal (any combination of varieties)
2 sticks butter
2 packages dry onion soup mix
salt to taste
Measure Chex cereal in large bowl. Melt butter and add soup mix and salt. Pour mixture over Chex mix. Shake well. Bake at 250 degrees in 13"x9" pan for one hour, shaking every 20 minutes.