(as seen on Pennies on a Platter)

5 cups Cheerios
5 cups Corn Chex
2 cups peanuts (optional)
10 oz bag small twist pretzels
1 big bag of M&M's (I used the dark chocolate kind)
3 Tbsp vegetable oil
2 (12 oz) bags Nestle Premier White Morsels

In a big mixing bowl, mix the cheerios, corn chex, peanuts, pretzels and M&M's.

Melt the vegetable oil and white morsels together in a double-boiler (or a heat-proof bowl over simmering water) and pour over chex mix.  Mix with wooden spoon or if the bowl has a lid, shake the bowl to mix.  If desired, lay out on wax paper to dry or just let dry in bowl without lid on.

Source: "C", Friend of Pennies on a Platter

http://penniesonaplatter.com/2009/10/16/white-chocolate-chex-mix/