Combine the M&M's, Cheerios, Chex cereal, peanuts, and pretzel sticks in a mixing bowl. Add in more of any of the items you would like. These measurements are just rough estimates. Use less for a smaller batch.
Melt the white chocolate chips. If there are instructions on the package, follow those. If not, start with 1 minute in the microwave. Stir and continue to microwave in 10 second increments until melted.
Pour melted white chocolate over dry mix in bowl.
Cover the mix with the chocolate and stir to combine quickly.
Spread the coated mixture onto a baking sheet lined with parchment paper.