1Slowly melt white chocolate in top of double boiler over simmering water.
Mix rice chex, corn chex, Cheerios, pretzels, peanuts and M&M's in large bowl. Slowly pour chocolate over mixture and stir to evenly coat. Spread the mixture on wax paper and cool. break into small pieces. Store in airtight container and refrigerate to keep fresh.
Makes 12 to 14 cups.